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1815=85x-20(30-30)
We move all terms to the left:
1815-(85x-20(30-30))=0
We add all the numbers together, and all the variables
-(85x-200)+1815=0
We get rid of parentheses
-85x+200+1815=0
We add all the numbers together, and all the variables
-85x+2015=0
We move all terms containing x to the left, all other terms to the right
-85x=-2015
x=-2015/-85
x=23+12/17
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