Question

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

Answer 1

$\rm{8m-5n-3p=8(15)-5(-4)-3(20)}\quad\textrm{... Since m = 15, n = -4 and p = 20}$

$\longrightarrow\rm{8m-5n-3p=120+20-60}$

$\longrightarrow\rm{8m-5n-3p=140-60=80}$