Use the first equation (y= 6x - 11) to simplify the second equation (reduce the number of variables there from 2 to 1):
-2x - 3(6x - 11) = -7
-2x - 18x + 33 = -7. Combining like terms, -20x = -40, or x = 2.
If x = 2, use the first equation to determine y: y = 6(2) - 11 = 1
The solution is (2,1).
