9a-20=70

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Solution for 9a-20=70 equation: 



9a-20=70

We move all terms to the left:

9a-20-(70)=0

We add all the numbers together, and all the variables

9a-90=0

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

9a=90

a=90/9

a=10

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