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(3x-7)-x-4=0
We add all the numbers together, and all the variables
-1x+(3x-7)-4=0
We get rid of parentheses
-1x+3x-7-4=0
We add all the numbers together, and all the variables
2x-11=0
We move all terms containing x to the left, all other terms to the right
2x=11
x=11/2
x=5+1/2
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