A:B=3:5 B:C=9:13 tentukan nilai dari A+2/3B+4/5C

Mapel Matematika
Bab Perbandingan

A : B = 3 : 5
B : C = 9 : 13

A : B : C = 27 : 45 : 65

Nilai A + (2/3)B + (4/5)C
= 27 + (2/3)(45) + (4/5)(65)
= 27 + 30 + 52
= 109

Penyelesaian :
Perbandingan belum diketahui
A : {B} = 3 : {5} => ... × 9
{B} : C = {9} : 13 => ... × 5

Perbandingan diketahui
= A : B : C
= 27 : 45 : 65

Nilai a + 2/3b + 4/5c
= 27 + (2/3×45) + (4/5×65)
= 27 + 30 + 52
= 109 ✔

Good Luck :)