我想問一元一次方程點做?10點

第一題 :

(P-2)/2 = P ,兩邊都乘2

P-2 = 2P ,兩邊都減P

-2 =2P-P

P = -2

第二題:

8-P = (P+16)/5 將兩邊都乘5

40-5P = P+16 再同一類別既野放係一齊

-5P-P = 16-40

-4P = -24 再一齊除-4

-4P/-4 = -24/-4

P = 6

1.
(P-2)/2 = P
P-2 = 2P
-2 = 2P-P
P = -2

2.
8-P = (P+16)/5
5(8-P) = P+16
40-5P = P+16
40-16 = P+5P
24 = 6P
P = 24/6
P = 4