Mathematics
Junior High
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為什麼不能是答案（-5）：3呢
在坐標平面上,若點(a,b)在直線3x+5y=0上,則a:b=
-5:3
3x=-5y
5:-3
x=y=
-5:3
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為什麼不能是答案（-5）：3呢
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