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8(x-9)=7x
We move all terms to the left:
8(x-9)-(7x)=0
We add all the numbers together, and all the variables
-7x+8(x-9)=0
We multiply parentheses
-7x+8x-72=0
We add all the numbers together, and all the variables
x-72=0
We move all terms containing x to the left, all other terms to the right
x=72
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