Step-by-step explanation:
6+5s-5t=
6+5•2-5•8=
6+10-40=
6+30=36
Answer:
-24
Into 6+5s-5t, substitute 4 for r, 2 for s and 8 for t:
6 + 5(2) - 5(8) = 6 + 10 - 40 = -24
