3x+2y=8 ①
6x-5y=-2 ②
①×2得6x+4y=16 ③
③-②得9y=18
y=2
把y=2代入①得3x+4=8
x=4/3
(x+y)/2+(x-y)/3=1.
(x+y)-5(x-y)=23x 题目有误
整理得
5x+y=6
9x-2y=0
解得x=6/19 y=27/19
肖元——解二元一次方程3x+2y=8,6x-5y=-2
3x+2y=8 ①
6x-5y=-2 ②
①×2得6x+4y=16 ③
③-②得9y=18
y=2
把y=2代入①得3x+4=8
x=4/3
(x+y)/2+(x-y)/3=1.
(x+y)-5(x-y)=23x 题目有误
整理得
5x+y=6
9x-2y=0
解得x=6/19 y=27/19