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-3.96+10.4x=12x+17.96
We move all terms to the left:
-3.96+10.4x-(12x+17.96)=0
We get rid of parentheses
10.4x-12x-17.96-3.96=0
We add all the numbers together, and all the variables
-1.6x-21.92=0
We move all terms containing x to the left, all other terms to the right
-1.6x=21.92
x=21.92/-1.6
x=-13+1/1.4285714285714
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