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20k+78=4(5k+18)
We move all terms to the left:
20k+78-(4(5k+18))=0
We calculate terms in parentheses: -(4(5k+18)), so:We get rid of parentheses
4(5k+18)
We multiply parentheses
20k+72
Back to the equation:
-(20k+72)
20k-20k-72+78=0
We add all the numbers together, and all the variables
6!=0
There is no solution for this equation
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