SOLUTION: How do I solve these by elimination or substitution? #1 y = -1 and x = 2 #2 y = 1/2 x + 2 and y = 2x-1

Algebra ->  Rational-functions -> SOLUTION: How do I solve these by elimination or substitution? #1 y = -1 and x = 2 #2 y = 1/2 x + 2 and y = 2x-1      Log On


   

Question 507280: How do I solve these by elimination or substitution?
#1 y = -1 and x = 2
#2 y = 1/2 x + 2 and y = 2x-1
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How do I solve these by elimination or substitution?
#1 y = -1 and x = 2
Solution: (2,-1)
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#2 y = 1/2 x + 2 and y = 2x-1
Substitution:
(1/2)x+2 = 2x-1
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Subtract (1/2)x from both sides to get:
(3/2)x = 3
(1/2)x = 1
x = 2
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Solve for "y":
y = (1/2)x+2
y = (1/2)2 + 2
y = 1 + 2
y = 3
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Cheers,
Stan H.
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