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Aflati valoare raportului numerelor x si y daca:
a)x+y/2x+3y=8/19
b)6x-2y/12x+5y=1/7
d)6x+2y / 5x+3y = 1,(1)
d)x-3y/2x+7y=0,0(6)
e)2x+5y/4x-y=1 intreg 18/19
f)x+0,5y/3x+y=7/18

URGENT VA ROG !!!!!!!!! DAU COROANA


Răspuns :

a) 19(x+y)=8(2x+23y)
19x+19y=16x+24y
3x=5y
x/y=5/3

b)7(6x-2y)=12x+5y
42x-14y=12x+5y
30x=19y
x/y=19/30

c) 6x+2y/5x+3y=10/9
9(6x+2y)=10(5x+3y)
54x+18y=50x+30y
4x=12y
x/y=12/4=3

d)x-3y/2x+7y=6/90=1/15
15(x-3y)=2x+7y
15x-45y=2x+7y
13x=52y
x/y=52/13=4

e) 2x+5y/4x-y=37/19
19(2x+5y)=37(4x-y)
38x+95y=148x-37y
-110x=-132y
x/y=132/110=66/55

f) 18(x+y/2)=7(3x+y)
18x+9y=21x+7y
2y=3x
3x=2y
x/y=2/3