Question

If x and y are two 3-digit numbers such that,x+y =120 and difference between x and y is 20,then find the number.

Answer 1

Answer:

x+y=120>equation 1

x-y=20

x+y=120+x-y=20=

2x=140

x=140/2

x=70

substitute in equation 1

x+y=120

70+y=120

y=120-70

y=50

Therefore, x=70

y=50