30k-60=20k-70

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Solution for 30k-60=20k-70 equation: 



30k-60=20k-70

We move all terms to the left:

30k-60-(20k-70)=0

We get rid of parentheses

30k-20k+70-60=0

We add all the numbers together, and all the variables

10k+10=0

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

10k=-10

k=-10/10

k=-1

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