中一的數學題(10)

2006-11-22 4:30 am
解下列各方程。
10) 16=8+0.4t
13) m+1/2=-7
16) 6-2y=10
19) 7-7份之6c=-5
22) 2n-5/3=3
25)x-1/2-1=7

回答 (7)

2006-11-22 4:40 am
✔ 最佳答案
10)16=8+0.4t
8=0.4t
t=20

13)m+1/2=-7
m=-7-1/2
m=-7.5

16) 6-2y=10
-2y=10-6
-2y=4
y=2

19) 7-6c/7=-5
49/7-6c/7=-5
49-6c=-5x7
49-6c=-35
84=6c
c=14

22)2n-5/3=3
6n/3-5/3=3
6n-5=9
6n=14
n=7/3

25)x-1/2-1=7
x=7+1/2+1
x=8.5
2006-11-22 4:42 am
10)t=20
13) m=7.5
16) y=-2
19) c=10/3
22) n=7
25)x=8.5
2006-11-22 4:42 am
10)16=8+0.4t
0.4t=16
t=40"
13)m+1/2=-7
m=8.5"
16)6-2y=10
2y=-4
y=-2"
19)7-7/6c=-5
7/6c=12
c=14"
22)2n-5/3=3
2n=4/3
n=2/3"
25)x-1/2-1=7
x=8.5"
2006-11-22 4:41 am
lemme answer la, wan dim i have time...

10) t = 20

13) m = -7.5

16) y = -2

19) c = 14

22) n = 7/3

25) x = 8.5

but please study harder la...
maybe you can buy some P3/P4 maths book to read geh...
2006-11-22 4:37 am
10)16=8+0.4t
t=20
13) m+1/2=-7
m=7.5
16) 6-2y=10
y=-2
19) 7-7份之6c=-5
c=.3333333333333333333333333333333333333333333333333333333333333333333
22) 2n-5/3=3
n=7
25)x-1/2-1=7
x=8.5
2006-11-22 4:34 am
你係唔明白d咩呀???
你講出黎,,我可能幫到你!!
同埋呢d數應該小學就教架喇啵!!
2006-11-22 4:33 am
You should do it yourself.
These questions are quite easy.
參考: me


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