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4x-20=28-4x
We move all terms to the left:
4x-20-(28-4x)=0
We add all the numbers together, and all the variables
4x-(-4x+28)-20=0
We get rid of parentheses
4x+4x-28-20=0
We add all the numbers together, and all the variables
8x-48=0
We move all terms containing x to the left, all other terms to the right
8x=48
x=48/8
x=6
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