a + 2b = 8ab
2a-4b =2ab
a x b =?![]()
2a-4b =2ab
a x b =?
Penjelasan dengan langkah-langkah:
a + 2b = 8ab
2a - 4b = 2ab |:2| a - 2b = ab
a + 2b = 8ab
a - 2b = ab
__________-
4b = 7ab
a = 7b/4b = 7/4
a + 2b = 8ab
a - 2b = ab
__________+
2a = 9ab
b = 9a/2a = 9/2
a×b = (7/4)×(9/2)
= 63/8
