2006-12-9 05:05 PM
1cm
HELP
3X+5X-2Y(162+52)=30
8X-2Y(214)=30----(1)
8X=30+2Y(162+52)
8X=30+2Y(214)
X=[30+2Y(214)]/8----(2)
SUB(2)INTO(1),
8X-2Y(214)=30
8{[30+2Y(214)]/8}-2Y(214)=30
8[(6420+428Y)/8]-428Y=30
6420+428Y-428Y=30
6420-856Y=30
6420-30=856Y
6390=856Y
Y=7.46,,
SUB (7=7.46) INTO (2),
X=[30+2Y(214)]/8
X=[30+2(7.46)(214)]/8
X=(30+3195)/8
X=3225/8
X=403.125,,
唔知你是否想得X&Y的VALUE? 答案不知是否正確..你自己CHECK翻ANSWERS啦
2006-12-10 04:23 PM
{chin}
[quote]原帖由 [i]cat.[/i] 於 2006-12-9 08:31 PM 發表
你係想搵x同y既value定係???
or 轉主項?? [/quote]
如果轉主項-.-
會有 [x] pr [y]