E(m-4)=21

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Solution for E(m-4)=21 equation: 



(E-4)=21

We move all terms to the left:

(E-4)-(21)=0

We get rid of parentheses

E-4-21=0

We add all the numbers together, and all the variables

E-25=0

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

E=25

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