(-3)m=4.2

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Solution for (-3)m=4.2 equation: 



(-3)m=4.2

We move all terms to the left:

(-3)m-(4.2)=0

We add all the numbers together, and all the variables

(-3)m-4.2=0

We multiply parentheses

-3m-4.2=0

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

-3m=4.2

m=4.2/-3

m=-1+1/2.5

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