Question

Solve for x.

13x + 7 = 5x - 20

x = -3
x = -1
x = 1
x = 3

Answer 1

Answer and step-by-step explanation:

13x + 7 = 5x - 20

13x - 5x = -20 - 7

8x = -27

x = -27/8

x ≈ -3.375

So the answer would be round to -3

x = -3

Hope this help you :3

Answer 2

Answer:
`\bold{x=-(27)/(8)}`

Explanation:

13x + 7 = 5x - 20

-5x -5x

8x + 7 = -20

- 7 - 7

8x = -27

÷8 ÷8

x =
`-(27)/(8)`

NONE of your answer choices are valid solutions:

Check x = -3 ---> 13(-3) + 7 = 5(-3) - 20

-39 + 7 = -15 - 20

-32 = -35 FALSE. not a solution

Check x = -1 ---> 13(-1) + 7 = 5(-1) - 20

-13 + 7 = -5 - 20

-6 = -25 FALSE. not a solution

Check x = 1 ---> 13(1) + 7 = 5(1) - 20

13 + 7 = 5 - 20

20 = -15 FALSE. not a solution

Check x = 3 ---> 13(3) + 7 = 5(3) - 20

39 + 7 = 15 - 20

46 = -5 FALSE. not a solution