A4n-40=7(-2n+2)

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Solution for A4n-40=7(-2n+2) equation: 



4A-40=7(-2A+2)

We move all terms to the left:

4A-40-(7(-2A+2))=0



We calculate terms in parentheses: -(7(-2A+2)), so:

7(-2A+2)

We multiply parentheses

-14A+14

Back to the equation:

-(-14A+14)



We get rid of parentheses

4A+14A-14-40=0

We add all the numbers together, and all the variables

18A-54=0

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

18A=54

A=54/18

A=3

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