SOLUTION: Solve the system by substitution. x + y = 12 y = 2x Need help someone

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Question 49316: Solve the system by substitution.
x + y = 12
y = 2x
Need help someone

Answer by Earlsdon(6294)   (Show Source): You can put this solution on YOUR website!
Solve by substitution:
1)
2) Substitute this into equation 1)
1a) Simplify and solve for x.
1b) Divide both sides by 3.
1c) Now substitute this into equation 2) and solve for y.
2a) Simplify.
2b)
Solution is: (4, 8)

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