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-5x+21=3(x-1)
We move all terms to the left:
-5x+21-(3(x-1))=0
We calculate terms in parentheses: -(3(x-1)), so:We get rid of parentheses
3(x-1)
We multiply parentheses
3x-3
Back to the equation:
-(3x-3)
-5x-3x+3+21=0
We add all the numbers together, and all the variables
-8x+24=0
We move all terms containing x to the left, all other terms to the right
-8x=-24
x=-24/-8
x=+3
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