Question

Ifx + y = 1 and x-y=3, then the value of x and y is
At 2 and +1 B) -2 and
C) -2 and 1​

Answer 1

Given :

• x + y = 1
• x - y = 3

To find :

• The values of x and y

Solution :

$x + y = 1 \: \: \: \: \: \: ...(1) \\ x - y = 3 \: \: \: \: \: \: ...(2)$

Add both equations

x + y = 1

+ x - y = 3

2x + 0 = 4

2x = 4

x = 4/2

x = 2

The value of x is 2.

Put the value of x in equation (1)

$x + y = 1 \\ 2 + y = 1 \\ y = 1 - 2 \\ y = - 1$

The value of y is -1