24. solve the system of equations algerbraically. show all of your steps. (2 points)

Question

y=x^(2)+2x
y=3x+20
I'm just having trouble understanding.

Please help

Answer 1

Since you have two values for y, just set them equal to each other:

x^2+2x = 3x+20
x^2-x-20 = 0
(x-5)(x+4) = 0

and you're home free...