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3x=77+4x+54
We move all terms to the left:
3x-(77+4x+54)=0
We add all the numbers together, and all the variables
3x-(4x+131)=0
We get rid of parentheses
3x-4x-131=0
We add all the numbers together, and all the variables
-1x-131=0
We move all terms containing x to the left, all other terms to the right
-x=131
x=131/-1
x=-131
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