Tell whether the ordered pair (-3,5) is a solution of the system

The ordered pair is (-3,5), the first number is the X coordinate, the second number is the Y coordinate.
 Replace the X and Y in the equations with the ordered pair and see if the equation is true or not:

2(-3) - 3(5) = -6 -15 = -21 TRUE

3(-3) - 5 = -9 - 5 = -14 TRUE

Both equations are true, so (-3,5) is a solution.