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9x+31x-7=8(5x+10)
We move all terms to the left:
9x+31x-7-(8(5x+10))=0
We add all the numbers together, and all the variables
40x-(8(5x+10))-7=0
We calculate terms in parentheses: -(8(5x+10)), so:We get rid of parentheses
8(5x+10)
We multiply parentheses
40x+80
Back to the equation:
-(40x+80)
40x-40x-80-7=0
We add all the numbers together, and all the variables
-87!=0
There is no solution for this equation
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