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5.4x+12=2(2.7x-9)
We move all terms to the left:
5.4x+12-(2(2.7x-9))=0
We calculate terms in parentheses: -(2(2.7x-9)), so:We get rid of parentheses
2(2.7x-9)
We multiply parentheses
4x-18
Back to the equation:
-(4x-18)
5.4x-4x+18+12=0
We add all the numbers together, and all the variables
1.4x+30=0
We move all terms containing x to the left, all other terms to the right
1.4x=-30
x=-30/1.4
x=-21+0.6/1.4
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