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
crimeas [40]
2 years ago
9

how many solutions are there to these equations plz I need help #1. 2x-x+7=x+3+4. #2. -2(x+1)=-2x+5 #3. 4x+2x+2=3x-7​

Mathematics
1 answer:
mote1985 [20]2 years ago
3 0

1# There are many solutions for the equation 2x - x + 7 = x + 3 + 4

2# There is no solution for the equation -2(x + 1) = -2x + 5

3# There is one solution for the equation 4x + 2x + 2 = 3x - 7

Step-by-step explanation:

The solution of an equation of one variable is

  • One solution if the variable in the left hand side equal to a number in the right hand side
  • No solution if the variable disappears and the left hand side not equal to the right hand side
  • Many solutions if the variable disappears and the left hand side equal to the right hand side

1#

∵ 2x - x + 7 = x + 3 + 4

- Add the like terms in each side

∴ (2x - x) + 7 = x + (3 + 4)

∴ x + 7 = x + 7

- Subtract x from both sides

∴ 7 = 7

∵ Left hand side = right hand side

∴ x can be any number

∴ The equation has many solutions

There are many solutions for the equation 2x - x + 7 = x + 3 + 4

2#

∵ -2(x + 1) = -2x + 5

- Simplify the left hand side

∴ -2(x) + -2(1) = -2x + 5

∴ -2x - 2 = -2x + 5

- Add 2x for both sides

∴ -2 = 5

∵ Left hand side ≠ right hand side

∴ x can not be any value

∴ The equation has no solution

There is no solution for the equation -2(x + 1) = -2x + 5

3#

∵ 4x + 2x + 2 = 3x - 7

- Add the like terms in the left hand side

∴ (4x + 2x) + 2 = 3x - 7

∴ 6x + 2 = 3x - 7

- Subtract 3x from both sides

∴ 3x + 2 = -7

- Subtract 2 from both sides

∴ 3x = -9

- Divide both sides by 3

∴ x = -3

∵ x has a value

∴ The equation has one solution

There is one solution for the equation 4x + 2x + 2 = 3x - 7

Learn more:

You can learn more about the solutions of the equations in brainly.com/question/1626495

#LearnwithBrainly

You might be interested in
A computer company produces an extremely light laptop and they claim it is the lightest on the market weighing only 32 ounces. t
Darina [25.2K]

Solution: We are given:

\mu=0.33,  \sigma =0.7

Let x be the weight (oz) of laptop

We have to find P(x>32)

To find the this probability, we need to find the z score value.

The z score is given below:

z=\frac{x-\mu}{\sigma}

       =\frac{32-33}{0.7}

       =-1.43

Now, we have to find P(z>-1.43)

Using the standard normal table, we have:

P(z>-1.43)=0.9236

0.9236 or 92.36% of laptops are overweight

       


4 0
2 years ago
What is the answer I need this to be right (n)=3.5 that’s all it gave me HELP
masha68 [24]

Answer:

I think it's 3.5, but this information is super vague, so try to uhh scroll down to see if there's more information

Step-by-step explanation:

3 0
2 years ago
What is the solution to the following system?
notsponge [240]

Answer:

the answer is c (2,1,0)

Step-by-step explanation:

4 0
3 years ago
Brainliest to correct!
Nimfa-mama [501]

szaeAnswer:

fhx

Step-by-step explanation:ees

ffwsc

4 0
2 years ago
Read 2 more answers
Solve for z. z−4/9−1/3=5/9
laila [671]
Z-4/9-1/3=5/9
z-4 =5/9(9-1/3)

z-4 =4.414814815

z =8.814
4 0
3 years ago
Read 2 more answers
Other questions:
  • Is the number of members of Club X greater than the number of members of Club Y ? (1) Of the members of Club X, 20 percent are a
    11·1 answer
  • A statistical procedure used to determine whether observed frequencies at each level of one categorical variable are similar to
    10·1 answer
  • Paige spent 1/5 of an hour playing on her phone. That used up 1/5 of her battery. How long would she have to play on her phone t
    14·1 answer
  • Which equation could be used to solve the following system?
    6·2 answers
  • Direct variations need help
    12·1 answer
  • Evaluate when <br> a =3 b= 4.5 and h = 6
    11·1 answer
  • 1. {26, 21, 28, 31, 9, 28, 16, 18, 21, 23, 29, 24, 19, 22, 25, 28}<br> Find the mean.
    10·2 answers
  • HELP ME WITH THIS MATH
    15·2 answers
  • Two step equation -5=d/4+3
    11·1 answer
  • Find the mass at time t=0. ANSWER HAS TO BE IN GRAMS
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!