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114=3x+2(5x-21)
We move all terms to the left:
114-(3x+2(5x-21))=0
We calculate terms in parentheses: -(3x+2(5x-21)), so:We get rid of parentheses
3x+2(5x-21)
We multiply parentheses
3x+10x-42
We add all the numbers together, and all the variables
13x-42
Back to the equation:
-(13x-42)
-13x+42+114=0
We add all the numbers together, and all the variables
-13x+156=0
We move all terms containing x to the left, all other terms to the right
-13x=-156
x=-156/-13
x=+12
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