10-10a+15a=20

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Solution for 10-10a+15a=20 equation: 



10-10a+15a=20

We move all terms to the left:

10-10a+15a-(20)=0

We add all the numbers together, and all the variables

5a-10=0

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

5a=10

a=10/5

a=2

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