Question

{4x+y=-3
x - y =-2
..........​

Answer 1

Răspuns:

4x+y= -3

x-y= -2

x-y= -2

x= -2+x

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

-8+4x+y= -3

4y+y= -3+8

5y=5

y=1

x-y= -2

x-1= -2

x= -2+1

x= -1