Question

find the value of : 8m-5n-3p, when m= 15 ,n= -4 and p = 20?

Answer 1

8(15)-5(-4)-3(20)
120+20-60

= 80

Answer 2

Solution:-

8m - 5n - 3p  when m = 15, n = - 4 and p = 20

Substituting the values of m = 15, n = - 4 and p = 20 in the above.

⇒ (8 × 15) - (5 × - 4) - (3 × 20)

⇒ 120 - (- 20) - 60

⇒ 120 + 20 - 60

⇒140 - 60

= 80

Answer.