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0.9x+5.1x=2(2.5x-3)
We move all terms to the left:
0.9x+5.1x-(2(2.5x-3))=0
We add all the numbers together, and all the variables
6x-(2(2.5x-3))=0
We calculate terms in parentheses: -(2(2.5x-3)), so:We get rid of parentheses
2(2.5x-3)
We multiply parentheses
4x-6
Back to the equation:
-(4x-6)
6x-4x+6=0
We add all the numbers together, and all the variables
2x+6=0
We move all terms containing x to the left, all other terms to the right
2x=-6
x=-6/2
x=-3
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