Question

amandaYA

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6.若(3x-2y)和(x+2y)成正比,且當x=2時,y=
–3,則x=-4時,y=

Answer 1

✨ Jawaban Terbaik ✨

Mer

(3x-2y)/(x+2y)=k
x=2,y=-3代入
(6+6)/(2-6)=k
k=-3
(3x-2y)/(x+2y)=-3
x=-4代入
(-12-2y)/(-4+2y)=-3
y=6

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