7 (x-8) - 8 (x-7) = x+7 - (x-3)

-x=10

x=-10, just combine like terms!

Remeber, you can do anything to an equation as long as you do it to both sides

also, - (x-3) means - 1 (x-3), don't forget to distribute

so distribute first

7x-56-8x+56=x+7-x+3

combine like terms

-x=10

x=-10

wow, that simplified fast