Question

3x-2y=-6
3x+4y=12
solve by elimination

Answer 1

find the value of 8x³-y³if 2x-yandxy=-1

Answer 2

(x,y) = (0,3)

Explanation:

`A:3x-2y = -6\\B:3x+4y=12\\B-A: 3x-3x+4y-(-2y)=12-(-6)\\simplify: 0x+6y=18\\6y=18\\divide\ by\ 6\ on both sides: y=3\\plug 3 into either equation: 3x+4(3)=12\\3x+12=12\\3x=0\\Therefore,\ x=0,y=3\\\\Check work:\ 3(0)-2(3)=0-6=-6`