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240=4(7x-3)
We move all terms to the left:
240-(4(7x-3))=0
We calculate terms in parentheses: -(4(7x-3)), so:We get rid of parentheses
4(7x-3)
We multiply parentheses
28x-12
Back to the equation:
-(28x-12)
-28x+12+240=0
We add all the numbers together, and all the variables
-28x+252=0
We move all terms containing x to the left, all other terms to the right
-28x=-252
x=-252/-28
x=+9
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