我唔識做maths 請教一教我做a thx

OKOK

1. 10/M -1 = 3

10/M -1 + 1 = 3 + 1 將條式兩面加一 可以令到左面冇左個一

10/M = 4

10/M x M = 4 x M 兩邊乘M 左邊10除M乘M 所以取消左左邊既M

10 = 4M 4個M等如10 甘你要計M既值 甘咪將10除4

10/4 = 4M/4

2.5 = M

M = 2.5

其實你呢度係咪有4條式要問?
Q2 2.5/2p+3=1

1.25P + 3 = 1 <=將2.5除2 = 1.25

1.25p + 3 - 3 = 1- 3 <=將成條式+3 注意:吾可以淨係加1邊 要成條式+

1.25p = - 2

P = -1.6

Q3 3.2/4a=7

3.2 / 4a x 4a = 7 x 4a <=兩面x 4a

3.2 = 7 x 4A

3.2 = 28 A <= 數字同數字x 有7個4A 所以有28個A

3.2/28 = 28A/28

A = 0.114 [取至小數後3個位]

Q4 4.6/k-1=2

4.6/k - 1 + 1 = 2 + 1 <=兩要加1

4.6/k = 3

4.6/k x k = 3 x k

4.6 = 3k

4.6/3 = 3k/3

k = 1.53 [取至小數後2位]

1.)10/m-1=3
(10/m)m-m=3m
10-m=3m
10-m+m=3m+m
10=4m
4m=10
4m/4=10/4
m=2.5
2)5/2p+3=1
(5/2p)2p+3(2p)=2p
5+6p=2p
5+6p-2p=2p-2p
5+4p=0
5+4p-5=0-5
4p=-5
4p/4=-5/4
p=-5/4
3) 2/4a=7
1/2a=7
(1/2a)(2a)=7(2a)
1=14a
14a=1
14a/14=1/14
a=1/14
4)6/k-1=2
(6/k)k-k=2k
6-k=2k
6-k+k=2k+k
6=3k
3k=6
3k/3=6/3
k=2