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
Wewaii [24]
3 years ago
12

3. Solve the equation for x: 3x - 4 = 7x + 8

Mathematics
2 answers:
Dennis_Churaev [7]3 years ago
8 0

Answer:

=−3

Step-by-step explanation:

liberstina [14]3 years ago
5 0

Answer:

B) x = -3

Step-by-step explanation:

3x - 4 = 7x + 8.

Subtract 7 from 3

3 - 7 = -4

-4x - 4 = 8

use additive inverses.

-4x - 4 + 4 = 8 + 4

8 + 4 = 12.

-4x ÷ -4 = 12 ÷ -4

x = -3.

Hope this helped.

You might be interested in
Find the solution of the system of equations.
Alexandra [31]

Answer:

x = -3

y = 9

Step-by-step explanation:

Add two equations up

4x + 5y - 9x - 5y = 33 - 18 add or subtract like terms

-5x = 15 divide both sides by -5

x = -3 we can use this information to find the value of y

4x + 5y = 33 replace x with -3

4 * (-3) + 5y = 33

-12 + 5y = 33 add 12 to both sides

5y = 45 divide both sides by 5

y = 9

5 0
3 years ago
12+b=<br> 26<br> Solve by using substitution
iren [92.7K]

Answer:

14

Step-by-step explanation:

12+b=26

b=26-12

b=14

8 0
3 years ago
Read 2 more answers
Evaluate 3x + 1/3 if x =1/4? simplify if possible​
Leni [432]

Answer:

3 x 1/4 + 1/3 = 1   1/12.

Step-by-step explanation:

1   1/12

OR

13/12

4 0
3 years ago
Read 2 more answers
Which model shows the correct factorization of x2 + 2x – 8?
expeople1 [14]
To factor x^2 + 2x - 8 follow these steps


1) Write to factors, with x as the first term, this way:

(x      )(x      )


2) The sign to the right of the x in the first factor is the same sign of the coeficient of x in the polynomial.

That is +.


The sign to the right of the x of the second factor is the product of the sign of the coefficent of x (this is +) and the sign of the independent term (this is - ).

So that is (+).(-) + -.

Now the two factors have this form:

(x +  ) (x  -  )


3) Now find two numbers whose product is - 8 and whose difference is +2


Those numbers are + 4 and -2.


Then the two factors are:

(x + 4) (x -  2).


So the answer if that the correct factorization is (x + 4) (x - 2)
4 0
3 years ago
Read 2 more answers
The slope of the line containing the points (-5, 3) and (-2, 1) is ________.
Murljashka [212]
Vas happenin?
Hope your day is going well
The slope is 3-1/ -5 - -2
2/-2
The slope is -1
Hope this helps *smiles*
5 0
3 years ago
Read 2 more answers
Other questions:
  • Please help ASAP
    12·2 answers
  • A jar contains 24 pennies. The pennies are taken out and divided into 2 piles. If the larger pile contains twice as many pennies
    6·2 answers
  • Someone please help me <br> Find the value of x .<br> A) 80 <br> B) 100<br> C) 130 <br> D)120
    7·1 answer
  • Veronica has to multiply 398 x 18. She says she can multiply 400 x 18 and then take away one group of 18
    10·1 answer
  • Which of these numbers has a 4 in the hundreds place?
    7·2 answers
  • How do you answer this? if you know how please teach me!!! Thx
    14·2 answers
  • What is the approximate distance between the two points A(4, -2) and B(-1, 1)
    13·1 answer
  • Consider the following graph of h(x) , a piecewise function, and determine the following answers in interval notation.
    6·1 answer
  • Help? I'm in Algebra and I'm the most unintelligent person that you can know and please comprehend that
    11·1 answer
  • A carpet cleaner charges $50.97 to travel to the customers house and $15.11 per room cleaned. In the carpet cleaner charged $96.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!