Mathematics
Junior High
Resolved
これを教えてください。
途中まではわかるんですけどこの次が分かりません。
D'
(3)3(x+2y)=(x-4)…①
x+3g=-2.②
①より3x+6g-5x20... ①
3x5x=-20-67
-2x=-20-67
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