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65x+1615x-21=42(40x+55)
We move all terms to the left:
65x+1615x-21-(42(40x+55))=0
We add all the numbers together, and all the variables
1680x-(42(40x+55))-21=0
We calculate terms in parentheses: -(42(40x+55)), so:We get rid of parentheses
42(40x+55)
We multiply parentheses
1680x+2310
Back to the equation:
-(1680x+2310)
1680x-1680x-2310-21=0
We add all the numbers together, and all the variables
-2331!=0
There is no solution for this equation
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