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fina = 4x
caca = 6x
Caca = 4 + Fina
6x = 4 + 4x
6x - 4x = 4
2x = 4
x = 2
tasya = 5x = 5 . 2 = 10 tahun
fina = 4x = 4.2 = 8 tahun
caca = 6x = 6.2 = 12 tahun
jumlah usia mereka = 30 tahun
Fina = 4x
Caca = 6x
Caca = 4 + fina
6x = 4 + 4x
2x = 4
x = 2
Jumlah umur mereka = 5x + 4x + 6x = 15x = 15 • 2 = 30 tahun