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
siniylev [52]
3 years ago
13

What is 3x-8=4. Solve for x. Explain.

Mathematics
1 answer:
tangare [24]3 years ago
3 0

Answer:

4

Step-by-step explanation: 3 x 4 = 12.

                                             12 - 8 = 4.

You might be interested in
Solve the following System of Three Equations: x−3y+z=−15<br> 2x+y−z=−2<br> x+y+2z=1
jeyben [28]

Answer:

x = -3 , y = 4 , z = 0

Step-by-step explanation:

Solve the following system:

{x - 3 y + z = -15

2 x + y - z = -2

x + y + 2 z = 1

Hint: | Choose an equation and a variable to solve for.

In the first equation, look to solve for z:

{x - 3 y + z = -15

2 x + y - z = -2

x + y + 2 z = 1

Hint: | Solve for z.

Subtract x - 3 y from both sides:

{z = 3 y + (-x - 15)

2 x + y - z = -2

x + y + 2 z = 1

Hint: | Perform a substitution.

Substitute z = -15 - x + 3 y into the second and third equations:

{z = -15 - x + 3 y

15 + 3 x - 2 y = -2

x + y + 2 (-15 - x + 3 y) = 1

Hint: | Expand the left hand side of the equation x + y + 2 (-15 - x + 3 y) = 1.

x + y + 2 (-15 - x + 3 y) = x + y + (-30 - 2 x + 6 y) = -30 - x + 7 y:

{z = -15 - x + 3 y

15 + 3 x - 2 y = -2

-30 - x + 7 y = 1

Hint: | Choose an equation and a variable to solve for.

In the second equation, look to solve for x:

{z = -15 - x + 3 y

15 + 3 x - 2 y = -2

-30 - x + 7 y = 1

Hint: | Isolate terms with x to the left hand side.

Subtract 15 - 2 y from both sides:

{z = -15 - x + 3 y

3 x = 2 y - 17

-30 - x + 7 y = 1

Hint: | Solve for x.

Divide both sides by 3:

{z = -15 - x + 3 y

x = (2 y)/3 - 17/3

-30 - x + 7 y = 1

Hint: | Perform a substitution.

Substitute x = (2 y)/3 - 17/3 into the third equation:

{z = -15 - x + 3 y

x = (2 y)/3 - 17/3

(19 y)/3 - 73/3 = 1

Hint: | Choose an equation and a variable to solve for.

In the third equation, look to solve for y:

{z = -15 - x + 3 y

x = (2 y)/3 - 17/3

(19 y)/3 - 73/3 = 1

Hint: | Isolate terms with y to the left hand side.

Add 73/3 to both sides:

{z = -15 - x + 3 y

x = (2 y)/3 - 17/3

(19 y)/3 = 76/3

Hint: | Solve for y.

Multiply both sides by 3/19:

{z = -15 - x + 3 y

x = (2 y)/3 - 17/3

y = 4

Hint: | Perform a back substitution.

Substitute y = 4 into the first and second equations:

{z = -x - 3

x = -3

y = 4

Hint: | Perform a back substitution.

Substitute x = -3 into the first equation:

{z = 0

x = -3

y = 4

Hint: | Sort results.

Collect results in alphabetical order:

Answer: {x = -3 , y = 4 , z = 0

6 0
3 years ago
Determine whether the situation calls for a survey, an observational study, or an experiment.
Svetradugi [14.3K]

Answer:

B. \displaystyle observational\:study

Explanation:

Compare people who have lower comprehension intelligence quotients than others.

I am joyous to assist you anytime.

8 0
3 years ago
I am not good at algebra so I REALLY NEED HELP WITH THE PROBLEM 8n+4n^2-8n!
NeX [460]

Answer:

4n^2

Step-by-step explanation:

8n+4n^2-8n

The first 8n + the other 8n is 0 because you combine like terms

6 0
3 years ago
Compare the probability of winning
kykrilka [37]

Answer:

B. would be the best choice

7 0
3 years ago
Read 2 more answers
Simplify this expression 5a/11a
barxatty [35]
You could cross cancel the a and your final answer would be 5/11
6 0
3 years ago
Read 2 more answers
Other questions:
  • Tricia made a circular mat from a square piece of cloth as shown in the diagram below.
    13·1 answer
  • Pleaseee!!!! Can somebody please answer my question
    10·1 answer
  • The sum of the interior angles of a polygon measure 2880°. what is the name of the polygon?
    11·1 answer
  • Please solve the following questions!
    14·1 answer
  • What are the expressions equal too 0.09x0.4
    8·2 answers
  • people in a city want to plant 1642 plants in the outskirts in a open land. they wanted to plant these plants in equal number of
    6·1 answer
  • What is the opposite of -3<br> -1<br> 0<br> -3<br> 3
    14·2 answers
  • Factor. Check by multiplying.<br> x^2 - 3x
    15·2 answers
  • 10. How can you use similar triangles to solve real-world problems?​
    14·1 answer
  • A store sells 20 oz bottles of soda for $1.60 or 12 oz bottles of soda for $1.08. Which one is a better buy? How much would your
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!