Question

1) х+у=-5;
2)х-у=3;
3) х-5у=3;
4) х=3у=0;
5)2х+4у=6.

Answer 1

Ответ:

1)x+y=-5

x+y+5=-5+5

x+y+5=0

2)x-y=3

x-y-3=3-3

x-y-3=0

3)x-5y=3

x-5y-3=3-3

x-5y-3=0

4)x=3y=0

(x,y)=(0=0)

0=3*0=0

0=0=0

(x,y)=(0,0)

5)2x+4y=6

2x+4y-6=0

x+2y-3=0