2a-4=40

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Solution for 2a-4=40 equation: 



2a-4=40

We move all terms to the left:

2a-4-(40)=0

We add all the numbers together, and all the variables

2a-44=0

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

2a=44

a=44/2

a=22

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