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X + 2y = 3 3x - 2y = 5 What is the solution to the system of equations? A) (4, 3.5) B) (2, 1/2) C) (2, -1) D) (1/2, 2)
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Sep 28, 2018
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X + 2y = 3
3x - 2y = 5
What is the solution to the system of equations?
A) (4, 3.5)
B) (2, 1/2)
C) (2, -1)
D) (1/2, 2)
Mathematics
high-school
VJPPaz
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You could plug them all in... but a faster way:
add the 2 equations together.
You would get:
4x = 8 (the 2y and -2y cancel out)
x = 2
Plug x back into one of the equations.
x + 2y = 3
2 + 2y = 3
2y = 1
y = 1/2
So... B (2, 1/2)
Vannesa
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Oct 3, 2018
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Vannesa
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