2a-4=5a-40

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Solution for 2a-4=5a-40 equation: 



2a-4=5a-40

We move all terms to the left:

2a-4-(5a-40)=0

We get rid of parentheses

2a-5a+40-4=0

We add all the numbers together, and all the variables

-3a+36=0

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

-3a=-36

a=-36/-3

a=+12

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