40k+80=30k-110

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Solution for 40k+80=30k-110 equation: 



40k+80=30k-110

We move all terms to the left:

40k+80-(30k-110)=0

We get rid of parentheses

40k-30k+110+80=0

We add all the numbers together, and all the variables

10k+190=0

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

10k=-190

k=-190/10

k=-19

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