Question

Umur ayah 4 thn yg lalu 2/3 kali umur ayah pd c thn yg akn dtng, (c= bil. blt postf). skrng umur ayah 27 thn lbhnya dr 1/5 umrnya pd 7 thn yg lalu, tntukan umur ayah saat ini! tentukan nilai c!

Answer 1

Msl umur ayah skrg = x
x = 27 + 1/5(x-7)
x= 27 + 1/5x -7/5
x-1/5x = 27-7/5
4/5 x = 27-7/5 | kalikan dg 5
4x = 135-7
4x =128
x = 32
jd umur ayh skrg tu 32 th
umur ayh 4 th yg ll = 28 th
28=2/3c
c=28.3/2
c=42th