Question

Find the value of x in x + y = 4 and x - y = 2.

Answer 1

Answer:

x = 3

Step-by-step explanation:

Given that,

x + y = 4   ......... (1)

x - y = 2    ......... (2)

sum of both equation

2x  = 6

x = 6/2

x = 3

Answer 2

Answer: x=3 and y=1

Step-by-step explanation:

x+y=4-----1

x-y=2------2

From 1 make y subject of formula:

x+y=4

y=4-x

Substitute the equation in 2

x-(4-x)=2

x-4+x=2

2x=6

x=3

Replace x=3 in y=4-x

y=4-3

y=1

Thus x=3 and y=1