Question

A+2b=1
a+4c=0
b+2c=1

Tentukan a+b+c
a= ¹/x
b=¹/y

Answer 1

Kita hilangkan variabel a.
a + 2b = 1
a + 4c = 0
--------------- -
2b - 4c = 1

b + 2c = 1
2(b + 2c) = 2(1)
2b + 4c = 2
2b - 4c = 1
---------------- -
8c = 1
c = ⅛
kita stubstitusikan
b + 2c = 1
b + ¼ = 1
b = 1 - ¼
b = ¾
kita stubstitusikan
a + 2b = 1
a + 1½ = 1
a = 1 - 1½
a = -½
Terima Kasih!