21.30=2.90+2.30(m-1)

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Solution for 21.30=2.90+2.30(m-1) equation: 



21.30=2.90+2.30(m-1)

We move all terms to the left:

21.30-(2.90+2.30(m-1))=0

We add all the numbers together, and all the variables

-(2.90+2.30(m-1))+21.3=0



We calculate terms in parentheses: -(2.90+2.30(m-1)), so:

2.90+2.30(m-1)

determiningTheFunctionDomain
2.30(m-1)+2.90

We add all the numbers together, and all the variables

2.30(m-1)+2.9

We multiply parentheses

2.3m-2.3+2.9

We add all the numbers together, and all the variables

2.3m+0.6

Back to the equation:

-(2.3m+0.6)



We get rid of parentheses

-2.3m-0.6+21.3=0

We add all the numbers together, and all the variables

-2.3m+20.7=0

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

-2.3m=-20.7

m=-20.7/-2.3

m=+9

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