Mathematics
Junior High
Solved
この解き方を教えてください！（代入式ではなく2枚目の写真のようなやり方？で）
x+ 2y =5
x- 3z = 10 )
2.x - 3y + 2z= - 10の
E/ 00
$8.3元4元連立方程式の1 (50 引き)
6r + 2u + 3z=D42
5x -3u+ 2z%=D 20/
2.x -9y- 4z=
25
(zのない式を2つ作る)
[解)
の×2
12.x +4 +6z=84 …O
②×3
15r - +6z=60 …)
- 3.x + 13 =24
の→O,の
5)
zのない式を
の×2
10x
6 y+ 4z = 40 …①
2
12.x -||5 =15
2のない式
6×4
- 12.x + 52y=96
37リ=111
リ= 3
マ4
12e-45=15
2.5
124-60
レニ5
36
2-2
30t6t32=42
32-6
( 1
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