7+0.20a=5+0.30a

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Solution for 7+0.20a=5+0.30a equation: 



7+0.20a=5+0.30a

We move all terms to the left:

7+0.20a-(5+0.30a)=0

We add all the numbers together, and all the variables

0.20a-(0.30a+5)+7=0

We get rid of parentheses

0.20a-0.30a-5+7=0

We add all the numbers together, and all the variables

-0.1a+2=0

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

-0.1a=-2

a=-2/-0.1

a=+20

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