Posted by True on Monday, July 30, 2012 at 9:20pm.
Find the value of y for which the equation below is true.
2x y + 7
x  = 7  3y
3, 3, 1, or 4

Algebra 2 (again)  MathMate, Monday, July 30, 2012 at 9:48pm
Multiply the second equation by 2 to get the system:
2x y + 7
2x = 14  6y
Equating the righthand side gives us the TWO equations:
2*(73*x)=(x+7)
which can be solved for x, and x=1
or
2*(73*x)=(x+7) which gives x=21/5.
Make an appropriate choice of the solutions.

Algebra 2 (again)  Steve, Tuesday, July 31, 2012 at 10:47am
These are matrices.
I get y=1
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