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13+15=-4(8x-7)
We move all terms to the left:
13+15-(-4(8x-7))=0
We add all the numbers together, and all the variables
-(-4(8x-7))+28=0
We calculate terms in parentheses: -(-4(8x-7)), so:We get rid of parentheses
-4(8x-7)
We multiply parentheses
-32x+28
Back to the equation:
-(-32x+28)
32x-28+28=0
We add all the numbers together, and all the variables
32x=0
x=0/32
x=0
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