2a+a+2a+a-a=20

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



2a+a+2a+a-a=20
We move all terms to the left:
2a+a+2a+a-a-(20)=0
We add all the numbers together, and all the variables
5a-20=0
We move all terms containing a to the left, all other terms to the right
5a=20
a=20/5
a=4

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