a=7,3a=-21

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Solution for a=7,3a=-21 equation: 



a=7.3a=-21

We move all terms to the left:

a-(7.3a)=0

We add all the numbers together, and all the variables

a-(+7.3a)=0

We get rid of parentheses

a-7.3a=0

We add all the numbers together, and all the variables

-6.3a=0

a=0/-6.3

a=0

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