計算すると…
x＋y＝12
99y-99y＝594
99x＋99y＝1188
-99x＋99y＝594
ーーーーーーーーー
198y＝1782
y＝9
x＝9+5-17
x＝3
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計算すると…
x＋y＝12
99y-99y＝594
99x＋99y＝1188
-99x＋99y＝594
ーーーーーーーーー
198y＝1782
y＝9
x＝9+5-17
x＝3
Users viewing this question
are also looking at these questions 😉
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