M(x-1)=2(x+1)

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Solution for M(x-1)=2(x+1) equation: 



(M-1)=2(M+1)

We move all terms to the left:

(M-1)-(2(M+1))=0

We get rid of parentheses

M-(2(M+1))-1=0



We calculate terms in parentheses: -(2(M+1)), so:

2(M+1)

We multiply parentheses

2M+2

Back to the equation:

-(2M+2)



We get rid of parentheses

M-2M-2-1=0

We add all the numbers together, and all the variables

-1M-3=0

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

-M=3

M=3/-1

M=-3

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