15a+20=-10

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Solution for 15a+20=-10 equation: 



15a+20=-10

We move all terms to the left:

15a+20-(-10)=0

We add all the numbers together, and all the variables

15a+30=0

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

15a=-30

a=-30/15

a=-2

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