40=4a-8

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Solution for 40=4a-8 equation: 



40=4a-8

We move all terms to the left:

40-(4a-8)=0

We get rid of parentheses

-4a+8+40=0

We add all the numbers together, and all the variables

-4a+48=0

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

-4a=-48

a=-48/-4

a=+12

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