Question

if x and y are 3-digit number such that X + Y = 220 and the difference between X and Y is 20 then find the number ​

Answer 1

Answer:

X=120

y=120

Step-by-step explanation:

X+y=220---->(1)

x-y=20---->(2)

add 1 and 2

2x=240

X=120

sub X in equation 1

get

y=120

Answer 2

Answer:

x-y=20

x=20+y

x+y=220

putting the value of x

20+y+y=220

20+2y=220

2y=220-20

2y=200

y=200/20

y=100

x=20+y

x=20+100

x=120