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12+13=-5(9x-5)
We move all terms to the left:
12+13-(-5(9x-5))=0
We add all the numbers together, and all the variables
-(-5(9x-5))+25=0
We calculate terms in parentheses: -(-5(9x-5)), so:We get rid of parentheses
-5(9x-5)
We multiply parentheses
-45x+25
Back to the equation:
-(-45x+25)
45x-25+25=0
We add all the numbers together, and all the variables
45x=0
x=0/45
x=0
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