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15=-5(2x-7)
We move all terms to the left:
15-(-5(2x-7))=0
We calculate terms in parentheses: -(-5(2x-7)), so:We get rid of parentheses
-5(2x-7)
We multiply parentheses
-10x+35
Back to the equation:
-(-10x+35)
10x-35+15=0
We add all the numbers together, and all the variables
10x-20=0
We move all terms containing x to the left, all other terms to the right
10x=20
x=20/10
x=2
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