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B : C = 6 : 5
A : B : C = 4 : 6 : 5
A + B = 10 (dijadikan koefisien kepemilikan)
C = 5 (dijadikan koefisien kepemilikan)
x = variabel kelipatan
Ax + Bx = 150.000 + Cx
10x = 150.0000 + 5x
5x = 150.000
x = 30.000
Jika 'mereka' itu merujuk ke jumlah uang A dan uang B maka
Uang A + Uang B = 10x = Rp. 300.000
Jika 'mereka' itu merujuk ke jumlah uang A, uang B, dan uang C maka
Uang A + Uang B + Uang C = 15x = Rp. 450.000
B : C = 6 : 5 | × 1
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A : B : C = 4 : 6 : 5
A = 4/5C
B = 6/5C
A + B = 150.000 + C
4/5C + 6/5C = 150.000 + C
10/5C = 150.000 + C
2C = 150.000 + C
2C - C = 150.000
C = 150.000
A = 4/5C
A = 4/5 × 150.000
A = 120.000
B = 6/5C
B = 6/5 × 150.000
B = 180.000
A + B + C
= 120.000 + 180.000 + 150.000
= 450.000