5a-15=-a+9

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Solution for 5a-15=-a+9 equation: 



5a-15=-a+9

We move all terms to the left:

5a-15-(-a+9)=0

We add all the numbers together, and all the variables

5a-(-1a+9)-15=0

We get rid of parentheses

5a+1a-9-15=0

We add all the numbers together, and all the variables

6a-24=0

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

6a=24

a=24/6

a=4

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