Jawapan

2016-06-12T18:05:11+08:00
M = 5m ÷ 7 - 4
m + 4 = 5m ÷ 7
7(m + 4) = 5m
7m + 28 = 5m
7m - 5m = 28
2m = 28
m = 28 ÷ 2
m = 14