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8x+42+3x-86=4x+78+5x+44
We move all terms to the left:
8x+42+3x-86-(4x+78+5x+44)=0
We add all the numbers together, and all the variables
8x+3x-(9x+122)+42-86=0
We add all the numbers together, and all the variables
11x-(9x+122)-44=0
We get rid of parentheses
11x-9x-122-44=0
We add all the numbers together, and all the variables
2x-166=0
We move all terms containing x to the left, all other terms to the right
2x=166
x=166/2
x=83
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