7k-21=70

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Solution for 7k-21=70 equation: 



7k-21=70

We move all terms to the left:

7k-21-(70)=0

We add all the numbers together, and all the variables

7k-91=0

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

7k=91

k=91/7

k=13

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