Question

X - 2y = 14
x + 3y = 9

Answer 1

X=14+2y

14+2y+3y=9

14+5y=9

5y=9-14

5y=–5

Y=–1

Answer 2

x = 12, y = -1

Explanation:

x - 2y = 14 (call this equation '1.')

x + 3y = 9 (call this '2')

'2' - '1' :

0x + (3 - -2)y = 9 -14

(3 + 2)y = -5

5y = -5

y = -1.

substitute than into '1':

x - 2(-1) = 14

x + 2 = 14

x = 12.

check we are correct by subbing into '2'.

x + 3y = 9

12 + 3(-1) = 12 - 3 =9

so, x= 12 and y = -1