7a-4+9a=-15

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Solution for 7a-4+9a=-15 equation: 



7a-4+9a=-15

We move all terms to the left:

7a-4+9a-(-15)=0

We add all the numbers together, and all the variables

16a+11=0

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

16a=-11

a=-11/16

a=-11/16

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