5a+7=3a+15

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Solution for 5a+7=3a+15 equation: 



5a+7=3a+15

We move all terms to the left:

5a+7-(3a+15)=0

We get rid of parentheses

5a-3a-15+7=0

We add all the numbers together, and all the variables

2a-8=0

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

2a=8

a=8/2

a=4

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