Question

Fie x ,y apratine lui N* prime intre ele .Aflati valoarea raportului x supra y stiind proportiile:

a) x supra x+2y=5 supra 17.

b) 2x+y supra x+2y=13 supra 17

c) 2x-y supra x+y=11 supra 16

d) x supra 3x+8y=1 supra 9

Va rog ajutati-ma am nevoie urgent!

Dau coronita!

Answer 1

x/x+2y=5/17

x/5=x+2y/17

17x=5x+10y

17x-5x=10y

12x=10y

x/y=12/10=6/5

2x+y/x+2y=13/17

2x+y/13=x+2y/17

34x+17y=13x+26y

21x=9y

x/y=21/9=7/3

2x-y/11=x+y/16

32x-16y=11x+11y

21x=27y

x/y=21/27=7/9

x=3x+8y/9

9x=3x+8y

6x=8y

x/y=6/8=3/4

imi dai coroana?