Question

2x+5y=190,xsupra2=ysupra5....cum se rezolva?

Answer 1

2x+5 =190
x/2 =y/5  ;5x =2y  ;  x =2y/5  inlocuim in prima relatie pe  x
2*2y/5  +5 =190  numitor  5
4y +25 =950
4y =950-25
4y =925
y =231.25
x =2y/5
x =2*231.25/5 =462.5/5 =92.5
 ( V:  2*92.5+5 =185+5 =190 )

Answer 2

2x+5y = 190
x/2 = y/5    y = 5x/2
2x + 25x/2 = 190  |·2
4x + 25x = 380       29x = 380      x = 380/29
760/29 + 5y = 190     5y = 190 - 760/29 = 4750/29     y = 950/29
760/29 + 4750/29 = 5510/29 = 190