Question 154933
The easiest way to solve this system of equations is:
As y is equal to both 3x + 1 and 6x - 1, so 
6x - 1 = 3x + 1
Solving it for x, we have
3x = 2
so x = 2/3
Substituting x = 2/3 into y = 3x + 1, we have
y = 3*(2/3) + 1 = 3
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ALTERNATIVE SOLUTION:
Change the system into standard form.
-3x + y = 1
-6x + y = -1
then solve it.