C. 5
Penjelasan dengan langkah-langkah:
K = a + b + c
78 = 4a + (7a - 5) + (5a + 3)
78 = (4a + 7a + 5a) - (5 + 3)
78 = 16a - 2
16a = 78 + 2
16a = 80
a = 80 ÷ 16
a =
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C. 5
Penjelasan dengan langkah-langkah:
K = a + b + c
78 = 4a + (7a - 5) + (5a + 3)
78 = (4a + 7a + 5a) - (5 + 3)
78 = 16a - 2
16a = 78 + 2
16a = 80
a = 80 ÷ 16
a =