Step-by-step explanation:
First simplify it. Combine like terms.
0.2 - 2m = 2.1m + 2.5 - 1.8m
0.2 - 2m = 0.3m + 2.5
Then isolate m. Add 2m on both sides, then subtract 2.5 from both sides.
0.2 - 2m = 0.3m + 2.5
0.2 = 2.3m + 2.5
-2.3 = 2.3m
Now divide by 2.3 to find m.
-2.3 = 2.3m
-1 = m
And so m = -1.
