Question

Se considera numerele naturale x,y,z.
a)Stiind ca x+2y=24 si x+y = 19,determinati y
b)Stiind ca 3x+2y=18 si 2x + 2y = 14,determinati x
c)Stiind ca x+2y+z = 17 si x+y = 10,determinati y+z

Answer 1

Răspuns:

A). (x+2y)-(x+y)=24-19

X+2y-x-y=5

Y=5

B).(3x+2y)-(2x+2y)=18-14

3x+2y-2x-2y=4

X=4

C).(x+2y+z)-(x+y)=17-10

X+2y+z-x-y=7

Y+z=7