Tentukan nilai a,b dan c 1.a:b=8:6,b=4/5 c dan c-b=18

Materi : Aljabar

Pembahasan :
a/b = 8/6
6a = 8b
3a = 4b

Substitusi b = 4/5c ...
c - b = 18
c - 4/5c = 18
1/5c = 18
c = 90

Substitusi c = 90...
b = 4/5c
b = 4/5(90)
b = 72

Substitusi b = 72...
3a = 4b
3a = 4(72)
a = 4(24)
a = 96