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)=0

We add all the numbers together, and all the variables

-10k+90=0

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

-10k=-90

k=-90/-10

k=+9

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