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I need help with 3x-y=4   y=6-2x
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3 votes
I need help with 3x-y=4   y=6-2x

User Srujan Reddy
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1 Answer

2 votes
Since you have a "y=" equation, this is solved nicely by substitution.
.. 3x -(6 -2x) = 4
.. 5x -6 = 4
.. 5x = 10
.. x = 2
Then
.. y = 6 -2x
.. y = 6 -2*2 = 2

The solution is (x, y) = (2, 2).
User Bruno Koga
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