1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MariettaO [177]
3 years ago
10

Solve each equation for the missing variable. If your answer is not an integer, write it as an improper fraction.

Mathematics
2 answers:
Andre45 [30]3 years ago
8 0
To start the problem, you will want to move the numbers with variables and the ones without to the other side, then combine them together so that there is only one thing on each side. Then divide on both sides by the variable's coefficient and you will get your answer. Here is it done for the 1st problem.
5n - 14 = 8n + 4 \\ 5n - 14 - 5n = 8n + 4 - 5n \\  - 14 = 3n + 4 \\  - 14 - 4 = 3n + 4 - 4 \\  - 18 = 3n \\  \frac{3}{3} n =   \frac{ - 18}{6}  \\ n =  - 6
For the second one you will want to start by simplifying everything on both sides since you can combine the constants (numbers without any variables). It should look like this:
- 15 + 4 - 5a =  - 2 + 26 + 30a \\  - 11 - 5a = 24 + 30a
What you can do from here is push constants to one side and variables to the other like before. Here is how it would look:
- 11 - 5a = 24 + 30a \\  - 11 - 5a - 24 = 24 - 24 + 30a \\  - 35 - 5a = 30a \\  - 35 - 5a + 5a = 30a + 5a \\  - 35 = 35a
Once there is only one thing on both side, you can divide both sides by the coefficient (the number attached to a variable) to get the variable alone.
35a =  - 35 \\  \frac{35}{35} a =  \frac{ - 35}{35}  \\ a =  - 1
Thus, a is equal to -1.

For the third problem, it is more of the same type of problem that we have done before. Since there are no multiples of anything (variables or constants) on each side, we can start pushing variables to one side and constants to the others like so:
- 8x + 25 = 3 - 9x \\   - 8x + 9x  + 25 = 3 - 9x + 9x \\ x + 25 = 3 \\ x + 25 - 25 = 3  - 25 \\ x =  - 22
Since x's coefficient is 1, there is no need to divide and your answer is -22.
FromTheMoon [43]3 years ago
4 0

First example:

Subtract the 8n on both sides to get the variable on one side of the equation. Do the same for the regular numbers. Then divide by -3.

5n-14=8n+4\\ \\ 5n-8n=4+14 \\ \\ -3n=18\\ \\ n=-6

This should be your final answer.

Second Example:

Do the same thing as explained in Example 1. Here's some work to help guide you.

-15 - 5a + 4 = -2 + 30a + 26\\ \\ -5a-30a=-2+26+15\\ \\ -35a=39\\ \\ a = \frac{39}{-35}

That should be your final answer here.

Third Example:

3 - 9x = -8x + 25\\ \\ -9x+8x=25-3\\ \\ -x=22\\ \\ x=-22

Hope this helps and its understandable! Let me know if you still don't understand.

You might be interested in
Choose 3 values that would make thi inequalitie true 28+x>42
Y_Kistochka [10]

9514 1404 393

Answer:

  14.01, 493, 87

Step-by-step explanation:

Subtracting 28 from both sides tells you the range of values you need to be looking at.

  28 + x > 42

  x > 14

Any values more than 14 will make the inequality true. Three of them are ...

  14.01, 493, 87

4 0
2 years ago
I need the answer fast please
shusha [124]
The diameter of the circle is needed. But to solve, you would simply multiply the diameter of the circle by pi (3.14).
3 0
2 years ago
Which triangles are similar?<br><br> A<br> B<br> C<br> D
klio [65]
I agree, the only 2 that look the most similar is B. and D.
5 0
3 years ago
Read 2 more answers
What is the value of n?
Sliva [168]

Answer:

D

Step-by-step explanation:

5n=85

n=17

3 0
3 years ago
Read 2 more answers
This bag has an unknown number of lollipops and jelly snakes in it. I know that Pr (jelly snake) = 4/5. How many jelly snakes co
juin [17]

Answer:

40.

Step-by-step explanation:

Let J represent jelly snake.

Let L represent lollipops

Let S represent sample space

Let y represent the number of jelly snake in the bag. I.e

Number of J = y

Number of L = 10

Number of S = 10 + y

From the question given, we were told that the probability of jelly snake P(J) is 4/5.

But probability of jelly snake, P(J) is given by:

P(J) = nJ/nS

nJ = y

nS = 10 + y

P(J) = 4/5

Thu, we can obtain the number jelly snake, y, in the bag as follow:

P(J) = nJ/nS

4/5 = y/(10 + y)

Cross multiply

5y = 4(10 + y)

Clear bracket

5y = 40 + 4y

Collect like terms

5y – 4y = 40

y = 40

Therefore, the number of jelly snake in the bag is 40

8 0
3 years ago
Other questions:
  • If two triangles have three corresponding angles and three corresponding sides that are equal in measure, are the two triangles
    10·2 answers
  • How many times do the graphs of<br>the equations y = 2x + 4 and<br>y = -x + 4 intersect?​
    11·1 answer
  • PLEASE HURRYYYY<br><br> find three points that solve the equation x- 4y=-18
    14·2 answers
  • Describe the motion in the graph below.
    6·2 answers
  • In 2012, the population of China was about 1.351 x 10^9 and the population of Japan was about 1.280 x 10^8. Based upon these est
    7·1 answer
  • How many 1/2 cup servings are there in seventh 8th cup of peanut butter
    5·1 answer
  • 2. Cory makes a map of his favorite park, using a coordinate system with units of yards. The old oak tree is at position (1, 10)
    11·1 answer
  • Find the next 3 terms of each sequence<br> 1. [4, 8, 12, 16 ...}
    10·1 answer
  • Is 23 a prime number
    10·1 answer
  • Write 1.74 x 10^-4 as an ordinary number
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!