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