6a+4=7a-9

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Solution for 6a+4=7a-9 equation: 



6a+4=7a-9

We move all terms to the left:

6a+4-(7a-9)=0

We get rid of parentheses

6a-7a+9+4=0

We add all the numbers together, and all the variables

-1a+13=0

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

-a=-13

a=-13/-1

a=+13

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