a=2a-7a

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Solution for a=2a-7a equation: 



a=2a-7a

We move all terms to the left:

a-(2a-7a)=0

We add all the numbers together, and all the variables

a-(-5a)=0

We get rid of parentheses

a+5a=0

We add all the numbers together, and all the variables

6a=0

a=0/6

a=0

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