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12+3=4(2x-18)
We move all terms to the left:
12+3-(4(2x-18))=0
We add all the numbers together, and all the variables
-(4(2x-18))+15=0
We calculate terms in parentheses: -(4(2x-18)), so:We get rid of parentheses
4(2x-18)
We multiply parentheses
8x-72
Back to the equation:
-(8x-72)
-8x+72+15=0
We add all the numbers together, and all the variables
-8x+87=0
We move all terms containing x to the left, all other terms to the right
-8x=-87
x=-87/-8
x=10+7/8
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