Question

3x +2y =18
X+y =10
X=?
Urgent

Answer 1

$x + y = 10$

$x = 10 - y$

$3x + 2y = 18$

$3(10 - y) + 2y = 18$

$30 - 3y + 2y = 18$

$- 3y + 2y = 18 - 30$

$- y = - 12 \: | \times ( - 1)$

$y = 12$

$x = 10 - y$

$x = 10 - 12$

$x = - 2$