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15=-6(3+x)+4(x-6)
We move all terms to the left:
15-(-6(3+x)+4(x-6))=0
We add all the numbers together, and all the variables
-(-6(x+3)+4(x-6))+15=0
We calculate terms in parentheses: -(-6(x+3)+4(x-6)), so:We get rid of parentheses
-6(x+3)+4(x-6)
We multiply parentheses
-6x+4x-18-24
We add all the numbers together, and all the variables
-2x-42
Back to the equation:
-(-2x-42)
2x+42+15=0
We add all the numbers together, and all the variables
2x+57=0
We move all terms containing x to the left, all other terms to the right
2x=-57
x=-57/2
x=-28+1/2
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