15a+2a=6a+9a+20

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Solution for 15a+2a=6a+9a+20 equation: 



15a+2a=6a+9a+20

We move all terms to the left:

15a+2a-(6a+9a+20)=0

We add all the numbers together, and all the variables

15a+2a-(15a+20)=0

We add all the numbers together, and all the variables

17a-(15a+20)=0

We get rid of parentheses

17a-15a-20=0

We add all the numbers together, and all the variables

2a-20=0

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

2a=20

a=20/2

a=10

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