= [3x + 9y + 6x - 2y]/12
Jumlahkan suku-suku sejenis
= (9x + 7y)/12
2.) (x - y)/4 - (2x + y)/8
Penyelesaian:
=(x - y)/4 - (2x + y)/8
Samakan penyebutnya
= 2(x - y)/8 - (2x + y)/8
= [2(x - y) - (2x + y)]/8
= [2x - 2y - 2x - y]/8
= [3x + 9y + 6x - 2y]/12
Jumlahkan suku-suku sejenis
= (9x + 7y)/12
2.) (x - y)/4 - (2x + y)/8
Penyelesaian:
=(x - y)/4 - (2x + y)/8
Samakan penyebutnya
= 2(x - y)/8 - (2x + y)/8
= [2(x - y) - (2x + y)]/8
= [2x - 2y - 2x - y]/8
Editor: Aziz Abdillah