SOLUTION: I have an elimination question I hope some one could help me? x/2+2y=9 2x-y=18 thank you also if you have time could you help me with this graph Solve the following system

Question 24437: I have an elimination question I hope some one could help me?
x/2+2y=9
2x-y=18
thank you
also if you have time could you help me with this graph
Solve the following systems of equations by graphing:
y=x^2-4 and y=x-2
this would be greatly appreciated.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
1) Solve by elimination:
1) Multiply this equation by 4 to get equation 1a)
2)
1a) Now subtract equation 2) from equation 1a)to eliminate x.

----------------
Divide both sides of the equation by 9.
Now substitute this value of y into either of the two original equations and solve for x. Take the second equation.

Add 2 to both sides.
Divide both sides by 2.

The solution is: (10, 2)
Here's the graphical solution:

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