mohon bantuannya dg caranya
Penjelasan dengan langkah-langkah:
a + 2b = 1
-2b - c = 2
a + c = 4
a + 2b = 1
-2b - c = 2
---------------- +
a - c = 3
a = 3 + c
a + c = 4
a = 4 - c
3 + c = 4 - c
2c = 1
c = ½
a = 3½
-2b - ½ = 2
b = 1¼
a + b + c = 3½ + 1¼ + ½ = 5¼ = 9/4
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