30+a=40,a=

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Solution for 30+a=40,a= equation: 



30+a=40.a=

We move all terms to the left:

30+a-(40.a)=0

We add all the numbers together, and all the variables

a-(+40.a)+30=0

We get rid of parentheses

a-40.a+30=0

We add all the numbers together, and all the variables

-39a+30=0

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

-39a=-30

a=-30/-39

a=10/13

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