3a+20=11

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Solution for 3a+20=11 equation: 



3a+20=11

We move all terms to the left:

3a+20-(11)=0

We add all the numbers together, and all the variables

3a+9=0

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

3a=-9

a=-9/3

a=-3

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