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(0.9)m=-2
We move all terms to the left:
(0.9)m-(-2)=0
We add all the numbers together, and all the variables
(0.9)m+2=0
We multiply parentheses
0.9m+2=0
We move all terms containing m to the left, all other terms to the right
0.9m=-2
m=-2/0.9
m=-2+0.2/0.9
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