Question

the sum of two numbers is 20 and the difference is 4

Answer 1

Answer:

X+y=20

x-y=4

=>2x=24

=>X=12

=>12-y=4

=>y=8

Answer 2

Answer:

Let,two number be 'X' &'Y'

By first condition,

x+y=20------(1)

By second condition,

x-y=4-------(2)

Adding en(1)&(2)

x+y=20

x-y=4

________

2x=24

x=12

put x=12 in eqn(1)

x+y=20

12+y=20

y=20-12

y=8

【X=12,Y=8】