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24(3x-21)=27(x+13)
We move all terms to the left:
24(3x-21)-(27(x+13))=0
We multiply parentheses
72x-(27(x+13))-504=0
We calculate terms in parentheses: -(27(x+13)), so:We get rid of parentheses
27(x+13)
We multiply parentheses
27x+351
Back to the equation:
-(27x+351)
72x-27x-351-504=0
We add all the numbers together, and all the variables
45x-855=0
We move all terms containing x to the left, all other terms to the right
45x=855
x=855/45
x=19
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