K, m, n each stand for a whole number.

They add together to make 1500

K+m+n=1500

M is 3 times as big as n.

K is twice as big a n.

Calculate the numbers k, m, n

You need to solve a system comprised of 3 equations.

1) k+m+n=1500

2) m=3n

3) k=2n

Replace equations 2) and 3) in 1) = > 2n+3n+n=1500 = > 6n=1500 = > n=250

By reaplacing n in 2) = > m=3*250=750

In 3) = > k=2*250=500