Jawapan

2015-09-21T13:36:18+08:00
2w=5-H
w= (5-H) bahagi 2
w= (5-7) bahagi 2
w= -1
2015-09-21T13:45:42+08:00
H = 7

h/3 = 2w + 5
h = 3(2w + 5)
h = 6w + 15
7 = 6w + 15
6w = 7 - 15
6w = -8
w = -4/3

h = (2w+5)/3
3h = 2w+5
3(7) = 2w+5
21 = 2w+5
2w = 21-5
2w = 16
w = 16/2
w = 8