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15x-3=3(4x+1)
We move all terms to the left:
15x-3-(3(4x+1))=0
We calculate terms in parentheses: -(3(4x+1)), so:We get rid of parentheses
3(4x+1)
We multiply parentheses
12x+3
Back to the equation:
-(12x+3)
15x-12x-3-3=0
We add all the numbers together, and all the variables
3x-6=0
We move all terms containing x to the left, all other terms to the right
3x=6
x=6/3
x=2
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