5a-7=9a+13

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Solution for 5a-7=9a+13 equation: 



5a-7=9a+13

We move all terms to the left:

5a-7-(9a+13)=0

We get rid of parentheses

5a-9a-13-7=0

We add all the numbers together, and all the variables

-4a-20=0

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

-4a=20

a=20/-4

a=-5

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