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15=2x-3(4x-10)
We move all terms to the left:
15-(2x-3(4x-10))=0
We calculate terms in parentheses: -(2x-3(4x-10)), so:We get rid of parentheses
2x-3(4x-10)
We multiply parentheses
2x-12x+30
We add all the numbers together, and all the variables
-10x+30
Back to the equation:
-(-10x+30)
10x-30+15=0
We add all the numbers together, and all the variables
10x-15=0
We move all terms containing x to the left, all other terms to the right
10x=15
x=15/10
x=1+1/2
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