3a+20=90

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Solution for 3a+20=90 equation: 



3a+20=90

We move all terms to the left:

3a+20-(90)=0

We add all the numbers together, and all the variables

3a-70=0

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

3a=70

a=70/3

a=23+1/3

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