3a+9+a+29=90

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Solution for 3a+9+a+29=90 equation: 



3a+9+a+29=90

We move all terms to the left:

3a+9+a+29-(90)=0

We add all the numbers together, and all the variables

4a-52=0

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

4a=52

a=52/4

a=13

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