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0.80+2.10m=0
We simplify the equation to the form, which is simple to understand
0.80+2.10m=0
We move all terms containing m to the left and all other terms to the right.
+2.1m=0-0.8
We simplify left and right side of the equation.
+2.1m=-0.8
We divide both sides of the equation by 2.1 to get m.
m=-0.38095238095238
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