Jawapan

2014-10-12T23:14:37+08:00
X = 6 - 2y gantikan x , (6 -2y) - 3y = 1 6 - 2y - 3y = 1 6 - 5y = 1 6 - 1 = 5y 5 = 5y 5 รท 5 = y 1 = y petak pertama = 5y petak kedua = 1 #maybe ?