Question

what is the solution of the system of equations?
y= 3x + 7
y= x-9

Graph each system. tell whether the system has no solution, one solution, many solutions
y= 2x - 3
y= -x +3

Answer 1

We can say that 3x + 7 = x - 9
3x = x - 16
2x = -16
x = -8

Now, let's find y.

y = x - 9
y = -8 - 9
y = -17

Answer 2

(-8,-17)