Umur B dua kali umur A , sedangkan umur C adalah 10 tahun lebih muda dari umur B jika rata - rata umur mereka adalah sama dengan umur C berapa jumlah umur A dan C ? @sertakan cara yaa
MathSolver74
B = 2A C = B + 10 (A + B + C)/3 = C maka A + C = ... Jawab: A + B + C = 3C A + B = 2C (B/2) + B = 2(B + 10) (3/2)B = 2B + 20 (1/2)B = 20 B = 40 C = 50 A = 20
A + C = 70
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ShooterM
A + B + C = 3C A + B = 2C (B/2) + B = 2(B + 10) (3/2)B = 2B + 20 (1/2)B = 20 B = 40 C = 50 A = 20 A + C = 70
C = B + 10
(A + B + C)/3 = C
maka A + C = ...
Jawab:
A + B + C = 3C
A + B = 2C
(B/2) + B = 2(B + 10)
(3/2)B = 2B + 20
(1/2)B = 20
B = 40
C = 50
A = 20
A + C = 70