Question 761100
Using y2 - y1/x2 - x1 = -3
      -5 -(-2)/x - 3  = -3
        -5 + 2/ x - 3 = -3
           -3/ x - 3 = -3
Cross multiply
           -3 = -3(x - 3)
           -3 = -3x + 9
            -3x = -3 - 9
            -3x = -12
              x = 4
Proof:
   y2 - y1/x2 - x1 = -3
   -5 -(-2)/4 - 3 = -3
        -3/1 = -3.
Hope this helps.
:-)