slove the following

Question

3x - y = 0 

5x + 5 = 0 

Answer 1

5x+5=0

5x+5-5=0-5

5x=-5

5x/5=-5/5

x=-1

 

3(-1)-y=0

-3-y=0

-3+3-y=0+3

-y=3

y=-3

Answer 2

3x - y = 0

5x + 5 = 0

 

Solve for x:

 

5x + 5 = 0

5x = -5                   [Subtract 5 from both sides]

x = -1                    [Divide both sides by 5]

 

Plug x = -1 into the first equation and solve for y:

 

3x - y = 0

3(-1) - y = 0          [Plugged in -1 in place of x, since x = -1]

-3 - y = 0               [Add y to both sides]

-3 = y