Question

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

Simplify R - S + T.

Answer 1

You want to find, r - s + t

You just told me that r is "11 - 2m"
That s is "n + 5"
And that -m - 3n + 8

Answer 2

So just change r s and t to what they are...