2a+10+a-20=140

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Solution for 2a+10+a-20=140 equation: 



2a+10+a-20=140

We move all terms to the left:

2a+10+a-20-(140)=0

We add all the numbers together, and all the variables

3a-150=0

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

3a=150

a=150/3

a=50

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