1.一個香腸包的售價是$y，一盒鮮奶的售價是$6試以代數式表示購買3個香腸包和2盒鮮奶所需的款項。
根據以下資料，建立可求得各未知數的方程。
a.美娜買了一對價值$400的運動鞋和一件價值$a的外套,共付$550.
b.已知提子每磅$b.李太太買了4磅提子,共付$84
c.某公共小巴上原有c名乘客,抵達旺角後,有一半乘客下車再有5名新乘客上車,這時車上共有12名乘客.
d.達榮的體重是d kg,志城比達榮重10kg,他們共重130kg.
e.詠彤有e張貼紙,詠瑜有的貼紙數量是詠彤的3倍,她們共有164張貼紙.
2006-11-12 11:53:54 · 10 個解答 · 發問者 ROCK ting 3 in 教育與參考 ➔ 小學及中學教育
1.
3y+6*2
a.
550-a=400
a=550-400
a=150
b.
4b=84
b=84除以4
b=21
c.
c除以2+5=12
c除以2=12-5
c=7*2
c=14
d.
2d+10=130
2d=130-10
d=120除以2
d=60
e.
e+3e=164
4e=164
e=164除以4
e=41
2006-11-12 14:01:44 · answer #1 · answered by funho 1 · 0⤊ 0⤋
1 ) 3y + ( 2 X 6 )
= 3y + 12
= 3 ( y + 4 )
a) 400 + a = 550
a = 550 - 400
a = 150
b) 4b = 84
b = 84 / 4
b = 21
c) ( c / 2) + 5 = 12
c / 2 = 12 - 5
c / 2 = 7
c = 7 * 2
c = 14
d) d + ( d+ 10 ) = 130
d + d+ 10 = 130
2d+ 10 = 130
2d = 130 - 10
2d = 120
d = 120 / 2
d = 60
e) e + ( 3* e )= 164
e + 3e = 164
4e = 164
e = 164 / 4
e = 41
2006-11-12 12:15:57 · answer #2 · answered by Twins 2 · 0⤊ 0⤋
B:
4b=84
b=21
C:
c除2+5=12
c=(12-5)乖2
c=14
D:
d+(10+d)=130
2d=130-10
2d=120
d=60
E:
e+3e=164
4e=164
e=41
2006-11-12 12:07:53 · answer #3 · answered by hebewong 1 · 0⤊ 0⤋
第1題咪係2y+6*3
第a題咪係400+a=550.
第b題咪係4b=84.
第c題咪係c÷2+5=12.
第d題咪係2d+10=130.
第e題咪係3e+e=164.
2006-11-12 12:07:39 · answer #4 · answered by 嘉怡 2 · 0⤊ 0⤋
1. 3y+2(6)=3y+12
a. 400+a=550
b. 4b=84
c. c除以2+5=12
d. (d+10)+d=130
e. 3e+e=164
先乘除後加減呀!!(有d係)
答案: 1. 冇答案
a. a=150
b. b=21
c. c=14
d. d=60
e. e=41
2006-11-12 12:06:55 · answer #5 · answered by kerr_115 1 · 0⤊ 0⤋
1. $(3y+6x2) = $(3y+12)
a. 400+a=550
a=150
b. 4b=84
b=21
c. c/2+5=12
c=14
d. d+(d+10)=130
d=60
e. e+(3e)=164
e=41
2006-11-12 12:06:04 · answer #6 · answered by Man Ho 2 · 0⤊ 0⤋
(a) 400 + a = 550
a = 550 - 400
a = 150
(b) 4 x b = 84
b = 84 / 4
b = 21
(c) (c/2) + 5 = 12
c/2 = 12 - 5
c/2 = 7
c = 7 x 2
c = 14
(d) d + (d + 10) = 130
2d + 10 = 130
2d = 130 - 10
2d = 120
d = 120 / 2
d = 60
(e) e + (3e) = 164
4e = 164
e = 164 / 4
e = 41
2006-11-12 12:04:57 · answer #7 · answered by vegitou 7 · 0⤊ 0⤋
1. 3y+12
2. a+400=500
a=500-400
a=100
3. 4b=84
b=84/4
b=21
4. c/2+5=12
c/2=12-5
c/2=7
c=7*2
c=14
5. d+10=130
d=130-10
d=120
6. 3e+e=164
4e=164
e=164/4
e=41
2006-11-12 12:02:34 · answer #8 · answered by C_O 2 · 0⤊ 0⤋
1.3y+6x2
a.400+a=550
b.4b=84
c. c/2+5=12
d.(d+10)+d=130
e.3e+e
2006-11-12 11:59:38 · answer #9 · answered by jkop 2 · 0⤊ 0⤋
1. 3y+(6成2)
a. 400+a=550
550-400=a
a=150
2006-11-12 16:59:15 補充：
b. 4b=84c. c除2 5=12d. d (d 10)=130
2006-11-12 17:01:05 補充：
e. 3e e=164
2006-11-12 17:02:08 補充：
ha~if no answer..like e e=10it is not equtions...
2006-11-12 11:57:14 · answer #10 · answered by jasoncheung1993 3 · 0⤊ 0⤋