Jawabanmu

2014-08-31T20:11:36+07:00
15x + (-30x) = -15x
14y + (-45)y = -31y
13z + 51z = 64z
maka,
jawabannya : -15x - 31y + 64z
2014-08-31T20:13:31+07:00
Jawab: (15x-30x) + (14y-45y) + (13z+51z) = -15x-31y+64z