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4(5-x)=-12
We move all terms to the left:
4(5-x)-(-12)=0
We add all the numbers together, and all the variables
4(-1x+5)-(-12)=0
We add all the numbers together, and all the variables
4(-1x+5)+12=0
We multiply parentheses
-4x+20+12=0
We add all the numbers together, and all the variables
-4x+32=0
We move all terms containing x to the left, all other terms to the right
-4x=-32
x=-32/-4
x=+8
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