7+.20a=5+.30a

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Solution for 7+.20a=5+.30a equation: 



7+.20a=5+.30a

We move all terms to the left:

7+.20a-(5+.30a)=0

We add all the numbers together, and all the variables

.20a-(.30a+5)+7=0

We get rid of parentheses

.20a-.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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