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198=-4x+-12x+6
We move all terms to the left:
198-(-4x+-12x+6)=0
We add all the numbers together, and all the variables
-(-16x)+198=0
We get rid of parentheses
16x+198=0
We move all terms containing x to the left, all other terms to the right
16x=-198
x=-198/16
x=-12+3/8
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