15-a+4a=-6

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Solution for 15-a+4a=-6 equation: 



15-a+4a=-6

We move all terms to the left:

15-a+4a-(-6)=0

We add all the numbers together, and all the variables

3a+21=0

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

3a=-21

a=-21/3

a=-7

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