-7 1/2m+2 2/3m+1/6m=1 3/4•(-2 1/3)+4 1/5•2 5/6

-7 1/2m+2 2/3m+1/6m=1 3/4•(-2 1/3)+4 1/5•2 5/6 -7 1/2m + 2 2/3m + 1/6m = -3 2/3 + 9 1/5

Combine like terms: -7 1/2m + 2 2/3m + 1/6m = 5 3/15

Simplify: -18/2m + 8/3m + 1/6m = 80/15

Calculate: -9m + 8/3m + 1/6m = 16/3

Combine like terms and solve for m: -9m + 8/3m + 1/6m = 16/3 -27/3m + 8/3m + 1/6m = 16/3 -18/3m = 16/3 -6m = 16 m = -16/6 m = -2 2/3

Ответ: m = -2 2/3