Jawabanmu

2014-03-10T07:53:06+07:00
a.×+4=9
x + 4 = 9
x = 9 - 4
x = 5

b.2×+15=×

2x + 15 = x
2x - x = -15
x = -15
2014-03-10T08:26:20+07:00
a.×+4=9
x + 4 = 9
x = 9 - 4
x = 5

b.2×+15=×

2x + 15 = x
2x - x = -15
x = -15