15-2a=-5

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Solution for 15-2a=-5 equation: 



15-2a=-5

We move all terms to the left:

15-2a-(-5)=0

We add all the numbers together, and all the variables

-2a+20=0

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

-2a=-20

a=-20/-2

a=+10

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