7y-21=70

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Solution for 7y-21=70 equation: 



7y-21=70

We move all terms to the left:

7y-21-(70)=0

We add all the numbers together, and all the variables

7y-91=0

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

7y=91

y=91/7

y=13

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