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

Simplify R - [S + T].

m - 2n - 2

-m + 2n - 2

3m - 4n + 14

-3m - 4n + 14 (not this one)

-m + 2n - 2

Step-by-step explanation:

R - [S + T]

We know R = 11 - 2m, S = n + 5, and T = - m - 3n + 8.

Substituting these values in

11 - 2m - [n + 5 + -m - 3n + 8]

Combining like terms

11 - 2m - [n + 5 + -m - 3n + 8]

11-2m - [-2n - m+13]

Distributing the negative sign

11-2m + 2n + m-13

Combine like terms

-2 - m + 2n

-m + 2n - 2