28a-7=15

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Solution for 28a-7=15 equation: 



28a-7=15

We move all terms to the left:

28a-7-(15)=0

We add all the numbers together, and all the variables

28a-22=0

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

28a=22

a=22/28

a=11/14

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