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3x-18=-6(2x+3)
We move all terms to the left:
3x-18-(-6(2x+3))=0
We calculate terms in parentheses: -(-6(2x+3)), so:We get rid of parentheses
-6(2x+3)
We multiply parentheses
-12x-18
Back to the equation:
-(-12x-18)
3x+12x+18-18=0
We add all the numbers together, and all the variables
15x=0
x=0/15
x=0
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