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23x-3(5x+12)=-64
We move all terms to the left:
23x-3(5x+12)-(-64)=0
We add all the numbers together, and all the variables
23x-3(5x+12)+64=0
We multiply parentheses
23x-15x-36+64=0
We add all the numbers together, and all the variables
8x+28=0
We move all terms containing x to the left, all other terms to the right
8x=-28
x=-28/8
x=-3+1/2
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