12+15a=23

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Solution for 12+15a=23 equation: 



12+15a=23

We move all terms to the left:

12+15a-(23)=0

We add all the numbers together, and all the variables

15a-11=0

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

15a=11

a=11/15

a=11/15

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