Question

1. What is the solution of the system of equations shown below?
y = 3x + 7
y = x-9

Answer 1

x= -8

y= -17

Explanation:

Answer 2

If you trying to find x and y is the answer is:

x=-8 and y=-17

or

(-8,-17)

Explanation:

First you need to subtract the two equations which becomes 2x+16=0

Now you move the 16 to the other side by subtracting 16 on both sides:

2x=-16

Now divide 2 on both sides to eliminate the 2 on 2x

x=-8

Now that you got -8 as x you can replace x on the two equations any one of them you only need to get one but I am going to use both of them to show you that it is the same:

y= 3(-8)+7

y=-17

y=-8-9

y=-17

Hope this helps!