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750=x-0.15x
We move all terms to the left:
750-(x-0.15x)=0
We add all the numbers together, and all the variables
-(+0.85x)+750=0
We get rid of parentheses
-0.85x+750=0
We move all terms containing x to the left, all other terms to the right
-0.85x=-750
x=-750/-0.85
x=882+0.3/0.85
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