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7+4x=2x+4
We move all terms to the left:
7+4x-(2x+4)=0
We get rid of parentheses
4x-2x-4+7=0
We add all the numbers together, and all the variables
2x+3=0
We move all terms containing x to the left, all other terms to the right
2x=-3
x=-3/2
x=-1+1/2
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