8a-13+a+12a-17a=23

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Solution for 8a-13+a+12a-17a=23 equation: 



8a-13+a+12a-17a=23

We move all terms to the left:

8a-13+a+12a-17a-(23)=0

We add all the numbers together, and all the variables

4a-36=0

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

4a=36

a=36/4

a=9

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