7a=20-3a

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Solution for 7a=20-3a equation: 



7a=20-3a

We move all terms to the left:

7a-(20-3a)=0

We add all the numbers together, and all the variables

7a-(-3a+20)=0

We get rid of parentheses

7a+3a-20=0

We add all the numbers together, and all the variables

10a-20=0

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

10a=20

a=20/10

a=2

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