12=0.2(40+v)

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Solution for 12=0.2(40+v) equation: 



12=0.2(40+v)

We move all terms to the left:

12-(0.2(40+v))=0

We add all the numbers together, and all the variables

-(0.2(v+40))+12=0



We calculate terms in parentheses: -(0.2(v+40)), so:

0.2(v+40)

We multiply parentheses

0.2v+8

Back to the equation:

-(0.2v+8)



We get rid of parentheses

-0.2v-8+12=0

We add all the numbers together, and all the variables

-0.2v+4=0

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

-0.2v=-4

v=-4/-0.2

v=+20

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