8a+9=10a-7

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Solution for 8a+9=10a-7 equation: 



8a+9=10a-7

We move all terms to the left:

8a+9-(10a-7)=0

We get rid of parentheses

8a-10a+7+9=0

We add all the numbers together, and all the variables

-2a+16=0

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

-2a=-16

a=-16/-2

a=+8

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