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40=(k*980)/49
We move all terms to the left:
40-((k*980)/49)=0
We add all the numbers together, and all the variables
-((+k*980)/49)+40=0
We multiply all the terms by the denominator
-((+k*980)+40*49)=0
We calculate terms in parentheses: -((+k*980)+40*49), so:We get rid of parentheses
(+k*980)+40*49
We add all the numbers together, and all the variables
(+k*980)+1960
We get rid of parentheses
k*980+1960
Wy multiply elements
980k+1960
Back to the equation:
-(980k+1960)
-980k-1960=0
We move all terms containing k to the left, all other terms to the right
-980k=1960
k=1960/-980
k=-2
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