Question

X - 2y = 5

-3x + 2y = 7
A.x=3, y=-1
B.x = 11, y = 12
C.x=-6, y =-
D. x= 3, y=1

Answer 1

The answer is A

3 - 2(-1) = 5

-3(3) + 2(-1) = 7

Answer 2

`x=-6,y=-5.5`

Explanation:

Given Equations:

`x - 2y = 5` equation:1

`-3x + 2y = 7` equation:2

Adding equation:1 and equation:2

`x - 2y+(-3x + 2y) = 5+7\\\\ x-2y-3x+2y=12\\\\-2x=12\\\\x=-(12)/(2)\\\\ x=-6\\`

Putting value of 'x' in equation:1

`x - 2y = 5`

`-6-2y=5\\\\-2y=5+6\\\\-2y=11\\\\y=-(11)/(2) \\\\y=-5.5`

`x=-6,y=-5.5`