10a+9=209

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Solution for 10a+9=209 equation: 



10a+9=209

We move all terms to the left:

10a+9-(209)=0

We add all the numbers together, and all the variables

10a-200=0

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

10a=200

a=200/10

a=20

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