Question

If X+y = 3, X-y=1 then
using
coammers gule find x.​

Answer 1

Answer:

$x + y = 3 \: \: \: \: \: \: equation \: 1\\ x - y = 1 \: \: \: \: \: equation \: 2\\ \\ from \: 1 \\ x = 3 - y \: \: \: equation \: 3\\ subtract \: in \: 2 \: equation \: 3 \ \\ 3 - y - y = 1 \\ 3 - 2y = 1 \\ - 2y = - 2 \\ - 2y = - 2 \\ \\ 2y = 2 \\ y = \frac{2}{2} \\ y = 1$

y=1

x=?

x+y=3

x+1=3

x=3-1

x=2