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-12(-3-12)=-9(1+7x-3)
We move all terms to the left:
-12(-3-12)-(-9(1+7x-3))=0
We add all the numbers together, and all the variables
-(-9(7x-2))-12(-15)=0
We add all the numbers together, and all the variables
-(-9(7x-2))+180=0
We calculate terms in parentheses: -(-9(7x-2)), so:We get rid of parentheses
-9(7x-2)
We multiply parentheses
-63x+18
Back to the equation:
-(-63x+18)
63x-18+180=0
We add all the numbers together, and all the variables
63x+162=0
We move all terms containing x to the left, all other terms to the right
63x=-162
x=-162/63
x=-2+4/7
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