9a-8a=-4+9

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Solution for 9a-8a=-4+9 equation: 



9a-8a=-4+9

We move all terms to the left:

9a-8a-(-4+9)=0

We add all the numbers together, and all the variables

9a-8a-5=0

We add all the numbers together, and all the variables

a-5=0

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

a=5

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