Mathematics
Junior High
Resolved
なぜ、これが3Xと4Yになるのですか?
y
(1)
4
5x+4y=8
X12
6
次の連立方程式を解きなさい。
11-13-200
y=2
......2 ②
6
3x-4y=24
2
+) 5x+4y=8
8x
=32
x=4
x=4を②に代入すると,
5x4+4y=8
4y=-12
y=-3
x=4, y=-3
(2)
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