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87(2x-3)=87(x-4)
We move all terms to the left:
87(2x-3)-(87(x-4))=0
We multiply parentheses
174x-(87(x-4))-261=0
We calculate terms in parentheses: -(87(x-4)), so:We get rid of parentheses
87(x-4)
We multiply parentheses
87x-348
Back to the equation:
-(87x-348)
174x-87x+348-261=0
We add all the numbers together, and all the variables
87x+87=0
We move all terms containing x to the left, all other terms to the right
87x=-87
x=-87/87
x=-1
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