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