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20(3-4x)+15x+12(3+4x)=1155
We move all terms to the left:
20(3-4x)+15x+12(3+4x)-(1155)=0
We add all the numbers together, and all the variables
20(-4x+3)+15x+12(4x+3)-1155=0
We add all the numbers together, and all the variables
15x+20(-4x+3)+12(4x+3)-1155=0
We multiply parentheses
15x-80x+48x+60+36-1155=0
We add all the numbers together, and all the variables
-17x-1059=0
We move all terms containing x to the left, all other terms to the right
-17x=1059
x=1059/-17
x=-62+5/17
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