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0.5x+12=-4x
We move all terms to the left:
0.5x+12-(-4x)=0
We get rid of parentheses
0.5x+4x+12=0
We add all the numbers together, and all the variables
4.5x+12=0
We move all terms containing x to the left, all other terms to the right
4.5x=-12
x=-12/4.5
x=-2+3/4.5
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