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-28x+63=4x-129
We move all terms to the left:
-28x+63-(4x-129)=0
We get rid of parentheses
-28x-4x+129+63=0
We add all the numbers together, and all the variables
-32x+192=0
We move all terms containing x to the left, all other terms to the right
-32x=-192
x=-192/-32
x=+6
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