4a-9=2a+9,9

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Solution for 4a-9=2a+9,9 equation: 



4a-9=2a+9.9

We move all terms to the left:

4a-9-(2a+9.9)=0

We get rid of parentheses

4a-2a-9.9-9=0

We add all the numbers together, and all the variables

2a-18.9=0

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

2a=18.9

a=18.9/2

a=9+0.9/2

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