Answer:
x = -105
Step-by-step explanation:
[tex]8(x+7)=7(x-7)\\\\8x+56=7x-49\\\\8x+56-56=7x-49-56\\\\8x=7x-105\\\\8x-7x=7x-7x-105\\\\\boxed{x=-105}[/tex]
Hope this helps.
8x + 56 = 7x-7
Cancel out 7 and subtract it with 8 as well, which leaves you...
x + 56 = -7
Subtract 56 with -7 (-7-56)
x = 63
