Question 419771
The notation (6,5) is shorthand for x = 6, y = 5.  If (6,5) is a solution to the equation y = 2x, then substituting 6 for x and 5 for y should give a true result.  Let's see ...

y = 2x
5 = 2 * 6
5 = 12 This clearly is a false statement, so (6,5) is NOT a solution for the equation y = 2x.