Question

m+p+n=3000
m+p=2456
p+n=928

Answer 1

m+p+n=3000
m+p=2456

2456+n=3000
n=3000-2456
n=544

p+n=928
m+928=3000
m=3000-928
m=2072

p+544=928
p=928-544
p=384