大問1の計算プリント ⑩0
次の連立方程式を解きなさい。
(3x +2y=7
(7)
2x+y=6
(8)
(9)
3x + 2y = 7
-4x+2y=12
- x=-5
x = 5
+2
10 +7=6
y = - 4
(3x+y=4
(x-2y = 13
(X. 1) =(5,-4)
6x+2y=8
x-27=13
7x=21
x = 3
3-2g=13
-22=10
y=-5
(2x-3y = 1
|3x + 2y = 8
(x, y) = (3₁-5)
4%-6g=2
+1 9 x + 6 7 = 24
13%=26
x = 2
6+2y=8
2y=2
y = 1
x, y) = (2, 1)
(10)
6x + 15g = -21
-)- 6x + 14 y = + 18
J = - 3
3x − 21 = -9
3x = 12
x=4
(11)
(2x + 5y = -7
3x + 7y=-9
(12)
(2x+y=11
y = 3x + 1
2 x + ( 3x + 1) = 11
5x4i||
y = 6 + 1
y=7
(x=2+y
9x - 5y = 2
(X₁2) =(4,-3)
• (A/2)
5x10
x = 2
9(2+y) - 5y = 2
18+9g-5y=2
x=-2
( x₁ 2) = (2, ¹),
4g=-16
y=-4
x = 24
(x,y)=(-2,-4)