50k+90=60k+130

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Solution for 50k+90=60k+130 equation: 



50k+90=60k+130

We move all terms to the left:

50k+90-(60k+130)=0

We get rid of parentheses

50k-60k-130+90=0

We add all the numbers together, and all the variables

-10k-40=0

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

-10k=40

k=40/-10

k=-4

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