Question

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Solve the system of equations algebraically. Show all of your steps.
y=+ 2z
y=3z+ 20

Answer 1

x^2 + 2x = 3x+20

-3x

x^2 - 1x = 20

- 20

x^2 -1x -20=0

(x-5)(x+4)

x-5 =0 or x+4=0

x = 5 or x= -4