Question

2x - y= -4
12x - y =66

Answer 1

x= 7 and y= 18 may it helps

Answer 2

Hey mate, here is your answer.: -)

$2x - y = - 4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: - (1)$
$12x - y = 66 \: \: \: \: \: \: \: \: \: \: \: \: \: \: - (2)$

on subtracting equation (1) and (2), we get...

$- 10x = - 70$
$10x = 70$
$x = \frac{70}{10}$
$x = 7$


on putting the value of x in equation (1)

$2(7) - y = - 4$
$14 - y = - 4$
$- y = - 4 - 14$
$- y = - 18$
$y = 18$
$hence \: the \: value \: of \: x \: is \: 7 \: and \: the \\ value \: of \: y \: is \: 18$

$hope \: it \: helps.....$