Question

stiind ca x supra 2 egal y supra 11 egal z supra 7 si x plus y plus z egal 80, calculati x, y, z.

repede, va rog! dau coroana!​

Answer 1

Răspuns:

x/2=y/11=z/7

x+y+z=80

x/2=y/11=z/7=k - coeficient de proportionalitate

x = 2k

y = 11k

z = 7k

2k+11k+7k=80

20k=80=>k=4

x=2·4=8

y=11·4=44

z=7·4=28

Answer 2

Răspuns:

8, 44, 28

Explicație pas cu pas:

x + y + z = 80

x/2 = y/11 = z/7

x/2 = y/11 = z/7 = k, astfel:

x = 2k

y = 11k

z = 7k

2k + 11k + 7k = 80

20k = 80

k = 4

♤ x = 2 × 4 = 8

♧ y = 11 × 4 = 44

☆ z = 7 × 4 = 28

Spor !! :)