Mathematics
Junior High
Resolved
x=30になるんですけど、どこが違いますか?
x + y = 50
20x 10 y = 8x50
X(00
100
100
100
20x-19y=42
x + y = 50
+ (2x - y = 4
4
32
x
54
=
=
18
Answers
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