7a+21=35

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Solution for 7a+21=35 equation: 



7a+21=35

We move all terms to the left:

7a+21-(35)=0

We add all the numbers together, and all the variables

7a-14=0

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

7a=14

a=14/7

a=2

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