Question

Ex 26 va rog mult. Dau coroana e fff urgent

Answer 1

z=y+20;

(x+y+z)/3=40 => x+ y + z= 120 => x+y + y+20=120 => x+2y=100;

x=x+40/100*z

y=y-20/100*y

(x+y+z)/3=40 => x+ y + z= 120 => x+y + y+20=120 => x+2y=100;

x+4/10*z + y-2/10*y + y +20 = 38*3

x + y/5 + 8 + 2y = 94

{x+y/5 + 2y = 86

{x+2y=100

Din ambele sisteme => y=-70 => z= -50 => x= 240