5a+7=15=7a

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Solution for 5a+7=15=7a equation: 



5a+7=15=7a

We move all terms to the left:

5a+7-(15)=0

We add all the numbers together, and all the variables

5a-8=0

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

5a=8

a=8/5

a=1+3/5

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