7a+4=3a+40

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Solution for 7a+4=3a+40 equation: 



7a+4=3a+40

We move all terms to the left:

7a+4-(3a+40)=0

We get rid of parentheses

7a-3a-40+4=0

We add all the numbers together, and all the variables

4a-36=0

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

4a=36

a=36/4

a=9

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