5x-4y= 17 ②
①*5-②*3:
15x-35y- 15x+ 12y = 5-5 1
-23y=-46
y=2
Give y=2 generations and get: 3x- 14= 1 x=5.
∴x=5
y=2
23x+ 17y=63 ①
17x+23y=57 ②
①× 17-②×23:23 * 17x+ 17 * 17y- 17 * 23x-23 * 23y = 63 * 17-57 * 23。
17? y-23? y = 107 1- 13 1 1
y( 17-23)( 17+23)=-240
-240y=-240
y= 1
Take y= 1 generation ①: 23x+ 17=63.
23x=46
x=2
∴x=2
y= 1
2x+y=6 ①
x+2y=3 ②
①-②×2: 2x+y-2x-4y=6-6。
y=0
Take y=0 and get 2x=6 from the first generation.
∴x=3
y=0
y=2x-3 ①
3x+2y=8 ②
From ① generation ②, 3x+4x-6=8 is obtained.
7x= 14
x=2
Take x=2 generations and get: y=4-3= 1.
∴x=2
y= 1