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4x+28=2x+-28
We move all terms to the left:
4x+28-(2x+-28)=0
We add all the numbers together, and all the variables
4x-(2x-28)+28=0
We get rid of parentheses
4x-2x+28+28=0
We add all the numbers together, and all the variables
2x+56=0
We move all terms containing x to the left, all other terms to the right
2x=-56
x=-56/2
x=-28
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