Y=x+5 and y=-2x-4 in substitution method

Hi

y = x+5

y = - 2x-4

x+5 = - 2x-4

x+2x = - 4-5

3x = - 9

x = - 9/3

x = - 3

y = x+5

y = - 3+5

y = 2

Answer: x = - 3 and y = 2

The two equations that have already been given in the question are

y = x + 5

And

y = - 2x - 4

Now let us substitute the value of y from the first equation to the second equation, we get

y = - 2x - 4

x + 5 = - 2x - 4

x + 2x = - 4 - 5

3x = - 9

x = - (9/3)

= - 3

Putting the value of x in the first equation, we get

y = x + 5

= - 3 + 5

= 2