40k+90=50k+60

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Solution for 40k+90=50k+60 equation: 



40k+90=50k+60

We move all terms to the left:

40k+90-(50k+60)=0

We get rid of parentheses

40k-50k-60+90=0

We add all the numbers together, and all the variables

-10k+30=0

We move all terms containing k to the left, all other terms to the right

-10k=-30

k=-30/-10

k=+3

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