h-howdy!
answer: -19/8
step by step
square both sides
9(x-1)=81(x+2)
divide both sides by 9
x-1=9(x+2)
expand
x-1=9x+18
subtract x from both sides
-1=9x+18-x
simplify
-1=8x+18
subtract 18 from both sides
-1-18=8x
simplify
-19=8x
divide both sides by 8
-19/8
h-hope this helped... :)
