40=5+7a

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Solution for 40=5+7a equation: 



40=5+7a

We move all terms to the left:

40-(5+7a)=0

We add all the numbers together, and all the variables

-(7a+5)+40=0

We get rid of parentheses

-7a-5+40=0

We add all the numbers together, and all the variables

-7a+35=0

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

-7a=-35

a=-35/-7

a=+5

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