Question

2/5m + 3/10m- 2/15m=1/6

Answer 1

2/5m+3/10m-2/15m=1/6
12/30m+9/30m-4/30m=1/6
21/30m-4/30m=1/6
17/30m=1/6
m=1/6:17/30
m=5/17

Answer 2

m * (2/5 + 3/10 - 2/15) = 1/6,
m * (12/30 + 9/30 - 4/30) = 5/30,
m * 17/30 = 5/30,
m = 5/30 : 17/30,
m = 5/30 * 30/17,
m = 5/17