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-4x+3(2x+5)=66
We move all terms to the left:
-4x+3(2x+5)-(66)=0
We multiply parentheses
-4x+6x+15-66=0
We add all the numbers together, and all the variables
2x-51=0
We move all terms containing x to the left, all other terms to the right
2x=51
x=51/2
x=25+1/2
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