4a+20=2a+40

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Solution for 4a+20=2a+40 equation: 



4a+20=2a+40

We move all terms to the left:

4a+20-(2a+40)=0

We get rid of parentheses

4a-2a-40+20=0

We add all the numbers together, and all the variables

2a-20=0

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

2a=20

a=20/2

a=10

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