1.巳知x的3倍與11之和是32，求x 。
2.巳知y的8倍减7是81，求y
3..z除以7後再加5的結果是18，求z
4.燕紅用$1000買了r張演唱會門票,試以代數式表示每張演唱會門票的價值.
有數學唔識做
2006-11-13 6:45 am
回答 (5)
2006-11-13 6:54 am
1. 3x+11=32
3x=32-11
3x=21
x=7
2. 8y-7=81
8y=81+7
8y=88
y=11
3. x
_
7+5=18
x
_
7 =23
x=23x7
x=161
4. (1000r)
3x=32-11
3x=21
x=7
2. 8y-7=81
8y=81+7
8y=88
y=11
3. x
_
7+5=18
x
_
7 =23
x=23x7
x=161
4. (1000r)
參考: 自己計出黎
2006-11-13 6:52 am
1. 3x+11=32
3x=21
x=7
2. 8y-7=81
8y=88
y=11
3. (z/7)+5=18
z/7=13
z=91
4. 設$x為每張演唱會門票的價值
rx=1000
x=1000/r
3x=21
x=7
2. 8y-7=81
8y=88
y=11
3. (z/7)+5=18
z/7=13
z=91
4. 設$x為每張演唱會門票的價值
rx=1000
x=1000/r
2006-11-13 6:52 am
1. 3x + 11 = 32
3x = 32 - 11
3x = 21
x = 21 / 3
x = 7
2. 8y - 7 = 81
8y = 81 + 7
8y = 88
y = 88/8
y = 11
3. z/7 + 5 = 18
z/7 = 18 - 5
z/7 = 13
z = 13*7
z = 91
3x = 32 - 11
3x = 21
x = 21 / 3
x = 7
2. 8y - 7 = 81
8y = 81 + 7
8y = 88
y = 88/8
y = 11
3. z/7 + 5 = 18
z/7 = 18 - 5
z/7 = 13
z = 13*7
z = 91
2006-11-13 6:52 am
1. 3x+11=32
3x=32-11
3x=21
x= 21/3
x=7
2. 8y-7=81
8y=81+7
8y=88
y=88/8
y=11
3. z/7 +5=18
z/7 =18-5
z/7=13
z= 13*7
z =91
4. 1000/r
3x=32-11
3x=21
x= 21/3
x=7
2. 8y-7=81
8y=81+7
8y=88
y=88/8
y=11
3. z/7 +5=18
z/7 =18-5
z/7=13
z= 13*7
z =91
4. 1000/r
參考: 自己
2006-11-13 6:52 am
给你算式自己计:
1. 3x + 11 = 32, x = ?
2. 8y - 7 = 81, y = ?
3. z / 7 + 5 =18, z = ?
4. 设每張演唱會門票價值$x.
x r = 1000
x = ?
1. 3x + 11 = 32, x = ?
2. 8y - 7 = 81, y = ?
3. z / 7 + 5 =18, z = ?
4. 设每張演唱會門票價值$x.
x r = 1000
x = ?
收錄日期: 2021-04-12 23:49:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061112000051KK06201