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4x-20=56+2x
We move all terms to the left:
4x-20-(56+2x)=0
We add all the numbers together, and all the variables
4x-(2x+56)-20=0
We get rid of parentheses
4x-2x-56-20=0
We add all the numbers together, and all the variables
2x-76=0
We move all terms containing x to the left, all other terms to the right
2x=76
x=76/2
x=38
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