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4(2-x)=x-12
We move all terms to the left:
4(2-x)-(x-12)=0
We add all the numbers together, and all the variables
4(-1x+2)-(x-12)=0
We multiply parentheses
-4x-(x-12)+8=0
We get rid of parentheses
-4x-x+12+8=0
We add all the numbers together, and all the variables
-5x+20=0
We move all terms containing x to the left, all other terms to the right
-5x=-20
x=-20/-5
x=+4
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