Question

The solution for equation x+y = 4 and x-y = 8 are​

Answer 1

Answer:

$x + y = 4 \\ x - y = 8 \\ \\ 2x = 12 \\ x = 6 \\ substituting \: values \: \\ of \: x \\ 6 + y = 4 \\ y = - 2$

Answer 2

Answer:

x = 6 and y = -2

Step-by-step explanation:

x + y = 4 ..........(1)      =>  x = 4 - y ...............(1)

x - y = 8 ...............(2)

Put (1) into (2)

4 - y - y = 8

4 - 2y = 8

2 - y = 4

y = -2...........(3)

put (3) into (1)

x = 4 -(-2)

   = 4 + 2

    = 6