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4x+84/8=-3x
We move all terms to the left:
4x+84/8-(-3x)=0
We get rid of parentheses
4x+3x+84/8=0
We multiply all the terms by the denominator
4x*8+3x*8+84=0
Wy multiply elements
32x+24x+84=0
We add all the numbers together, and all the variables
56x+84=0
We move all terms containing x to the left, all other terms to the right
56x=-84
x=-84/56
x=-1+1/2
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