x = -4y so 3x = -12y
Substituting in the second equation, -12y + 2y = 20 or -10y = 20 ie y = -2
And then x = -4y implies that x = 8
Solution: x = 8, y = -2
Chat with our AI personalities
3x+2y=20 5x-2y=1 (3x+2y) + (5x-2y)= 20+1 3x+5x= 21....... 8x=21.........x=2 5/8 Subsitute x=3(2 5/8)+ 2y=20........... 7 7/8 +2y=20.........2y= 20- 7 7/8....... y=6 1/16
3x + 2y = 7
(2, -1)
3x-2y-7=0
3x+2y = 1 2y = -3x+1 y = -1.5x+0.5