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7x-5=-(5x+2)
We move all terms to the left:
7x-5-(-(5x+2))=0
We calculate terms in parentheses: -(-(5x+2)), so:We get rid of parentheses
-(5x+2)
We get rid of parentheses
-5x-2
Back to the equation:
-(-5x-2)
7x+5x+2-5=0
We add all the numbers together, and all the variables
12x-3=0
We move all terms containing x to the left, all other terms to the right
12x=3
x=3/12
x=1/4
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