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27(x+7)=-21(x-9)
We move all terms to the left:
27(x+7)-(-21(x-9))=0
We multiply parentheses
27x-(-21(x-9))+189=0
We calculate terms in parentheses: -(-21(x-9)), so:We get rid of parentheses
-21(x-9)
We multiply parentheses
-21x+189
Back to the equation:
-(-21x+189)
27x+21x-189+189=0
We add all the numbers together, and all the variables
48x=0
x=0/48
x=0
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