Question 226269
Two of the numbers are Number 1 : (N1), and Number 2 : (N2).

Both numbers add up to equal 50.

N1 + N2 = 50

One is 4 times the other; for example I will use (N2).

N2 = 4(N1)

Substitute N2 in with 4(N1).

N1 + 4N1 = 50

5N1 = 50

5N1/5 = N1
50/5  = 10

N1 = 10

Substitute N1 with 10.

10 + N2 = 50

10 - 10 = 0
50 - 10 = 40

N2 = 40

In the end, the two numbers are 10 and 40.