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15(x-1)-4(x-3)=2(7.5+x)
We move all terms to the left:
15(x-1)-4(x-3)-(2(7.5+x))=0
We add all the numbers together, and all the variables
15(x-1)-4(x-3)-(2(x+7.5))=0
We multiply parentheses
15x-4x-(2(x+7.5))-15+12=0
We calculate terms in parentheses: -(2(x+7.5)), so:We add all the numbers together, and all the variables
2(x+7.5)
We multiply parentheses
2x+15
Back to the equation:
-(2x+15)
11x-(2x+15)-3=0
We get rid of parentheses
11x-2x-15-3=0
We add all the numbers together, and all the variables
9x-18=0
We move all terms containing x to the left, all other terms to the right
9x=18
x=18/9
x=2
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