Question

va rog!!! urgent !!!!​

Answer 1

Răspuns:

a.

$x+2y=24\\x+y=19\\(x+2y)-(x+y)=24-19 \\x+2y-x-y=5, y=5$

b.

$3x+2y=18\\2x+2y=14 \\(3x+2y)-(2x+2y)=18-14\\3x+2y-2x-2y=4\\x=4$

c.

$x+2y+z=17\\x+y=10\\x+2y+z-x-y=17-10\\z+y=7$

Explicație pas cu pas:

Answer 2

rezolvarea e in poza...................