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-2.4+m/2.5=-4.2
We move all terms to the left:
-2.4+m/2.5-(-4.2)=0
We add all the numbers together, and all the variables
m/2.5+1.8=0
We multiply all the terms by the denominator
m+(1.8)*2.5=0
We add all the numbers together, and all the variables
m+4.5=0
We move all terms containing m to the left, all other terms to the right
m=-4.5
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