Question

x-2y= -5

2x+y= -5

Answer 1

x-2y= -5

x= -5+2y

2x+y= -5

2*(-5+2y)+y= -5

-10+4y+y= -5

-10+5y= -5

5y= -5+10

5y= 5 Diwide both sides with 5

y=1

x= -5+2y

x= -5+2*1

x= -5+2

x= -3

Solution:

x= -3 y= 1

Checking of result:

x-2y= -5

-3-2*1= -5

-3-2= -5

-5= -5

OR

2x+y= -5

2*(-3)+1= -5

-6+1= -5

-5= -5