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140x-42=14(10x-3)
We move all terms to the left:
140x-42-(14(10x-3))=0
We calculate terms in parentheses: -(14(10x-3)), so:We get rid of parentheses
14(10x-3)
We multiply parentheses
140x-42
Back to the equation:
-(140x-42)
140x-140x+42-42=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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