Given: Q = 7m + 3n, R = 11 - 2m, S = n + 5, and T = - m - 3n + 8.

Simplify Q + S - T.

-8m + 7n - 3

-8m - 7n - 3

8m + 7n - 3

8m - 7n - 3

If you would like to simplify Q + S - T, you can do this using the following steps:

Q = 7m + 3n,

R = 11 - 2m,

S = n + 5,

T = - m - 3n + 8

Q + S - T = 7m + 3n + n + 5 - (-m - 3n + 8) = 7m + 3n + n + 5 + m + 3n - 8 = 8m + 7n - 3

The correct result would be 8m + 7n - 3.