Question

(1) 1/4 of John's spending is 3/8 of Peter's spending. Peter spends $64 less than John.

Answer 1

x= John's expenses

y = Peter's expenses

1/4 of Jean's expenses correspond to 3/8 of Pierre's expenses--->x/4 =3y/8

Peter spends $64 less than John--->x-y=64

we solve x/4=3y/8

8x=12y

2x=3y

x=3y/2

we replace x in the other equation:

x-y=64

3y/2 -y=64

(3y-2y)/2 =(64*2)/2

y = 128

Peter has $128

John is 128+64=$192