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Verified answer
DiketahuiB = 2A
C = B - 10
Ditanya, jumlah umur A dan C
Jawaban
=>
C = B - 10
C + 10 = B, ..... (1)
2A = B
A = B/2
A = (C + 10)/2 ..... (2)
Sehingga :
Umur C. = 30 Tahun,
Maka
Umur B :
= C + 10
= 30 + 10
= 40 Tahun
Umur A :
= B/2
= 40/2
= 20 Tahun
Jadi A + C = 20 + 30 = 50
JAWABAN E.
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