Question

P, q ,dan r adalah nilai sejumlh uang .jika q 25% lbh byk dri p ,r 20% kurang dari p, sedang r x% kurang dari q .brpkah nilai x% ..??

Answer 1

Q - 25% = p -> 4/4 q - 1/4 q = p (25% = 1/4)
alhasil 3/4q = p

r + 20% = p -> 5/r + 1/5r = p (20% = 1/5)
alhasil 6/5r = p

substitusikan
3/4q = 6/5r
q = 8/5 R

r + x% = q
x% = 8/5r - 5/5r
x% = 3/5r
x% = 3/5 . 100
-> 60%

semoga bener