連立方程式30問
次の連立方程式を解きなさい。
[-H-2y=-10
ly=-z+5
(5z+ 2y = 19
|-6z+7y=-4
[4z-9y=5
(10)
|5z-9y=-5
ーa+9y=-9
-2z+ 7y=-7
y=7z-10
[10z+7y=-7
|10z-9y=9
[6x-4y=-9
|8c + 10y =11
z-10y=-6
z+ 5y=9
(12)
|7z-3y=2
[7:ェ-8y=-8
(13)
(-z-9y=-9
(7z+5y =-5
(14)
[-2z-7y =7
「l4ly=0
(y=7z+9
[-10z+3y=5
(7z+y=7
「-2.z+y=6
「-7z+5y=2
(3z+5y =-8
1-3z+2y=-7
(15)
「=10y -3
(16)
エ+ 4y=3,
(5z-y=-9
1-5z-7y=9
