Respuesta :

pandaeyes1021

Answer:

x = -3

Step-by-step explanation:

First you need to distribute the 7 to (x + 4):

7x + 28 = 8x + 31

Then subtract 7x from both sides, making it cancel out on the left since 7x - 7x cancel each other out.

7x + 28 = 8x + 31

-7x          -7x

_____________

28 = x + 31

Then subtract 31 from both sides, making it cancel out on the right side:

28 = x + 31

-31        - 31

_________

-3 = x

Answer:

X= 3

Step-by-step explanation:

7(x+4)=8 x+31

7 x+28= 8 x+ 31          (move the 8 x over to subtract it from 7 x)

                                   (move the 28 over to subtract it from 31)

Hope This Helps!!!!!!!!!!!!!!!!

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