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4(3-x)+7x=4x+12+12x
We move all terms to the left:
4(3-x)+7x-(4x+12+12x)=0
We add all the numbers together, and all the variables
4(-1x+3)+7x-(16x+12)=0
We add all the numbers together, and all the variables
7x+4(-1x+3)-(16x+12)=0
We multiply parentheses
7x-4x-(16x+12)+12=0
We get rid of parentheses
7x-4x-16x-12+12=0
We add all the numbers together, and all the variables
-13x=0
x=0/-13
x=0
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