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6x+42-2=2x+56
We move all terms to the left:
6x+42-2-(2x+56)=0
We add all the numbers together, and all the variables
6x-(2x+56)+40=0
We get rid of parentheses
6x-2x-56+40=0
We add all the numbers together, and all the variables
4x-16=0
We move all terms containing x to the left, all other terms to the right
4x=16
x=16/4
x=4
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