13=a-7.4

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Solution for 13=a-7.4 equation: 



13=a-7.4

We move all terms to the left:

13-(a-7.4)=0

We get rid of parentheses

-a+7.4+13=0

We add all the numbers together, and all the variables

-1a+20.4=0

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

-a=-20.4

a=-20.4/-1

a=20+0.4/1

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