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4x=20+x
We move all terms to the left:
4x-(20+x)=0
We add all the numbers together, and all the variables
4x-(x+20)=0
We get rid of parentheses
4x-x-20=0
We add all the numbers together, and all the variables
3x-20=0
We move all terms containing x to the left, all other terms to the right
3x=20
x=20/3
x=6+2/3
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