Question

solve x+y=4 and 2x-y=2

Answer 1

$x + y = 4 \\ y = 4 - x \: \: \: \: .......(1) \\ \\ 2x - y = 2 \\from eq (1)\\ 2x - (4 - x) = 2 \\ 2x - 4 + x = 2 \\ 3x = 2+4 \\ x = \frac{6}{3} \\ x = 2 \\ \\ from \: eq(1) \\ y = 4 - 2 \\= 2$

So x = 2 and y = 2 .