40-2a=8

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Solution for 40-2a=8 equation: 



40-2a=8

We move all terms to the left:

40-2a-(8)=0

We add all the numbers together, and all the variables

-2a+32=0

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

-2a=-32

a=-32/-2

a=+16

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