1.                                6.

    a + 7 = 14 Circle Answer          m - 30 = 50 Circle Answer 
    a = 8                             m = 70 
    a = 21                            m = 20 
    a = 6                             m = 8 
    a = 7                             m = 110 
    none of the above                 none of the above, because m = 80

    2.                                7.

    b - 13 = 24 Circle Answer         r x 9 = 54 Circle Answer 
    b = 11                            r = 32 
    b = 37                            r = 7 
    b = 17                            r = 3 
    b = 47                            r = 6 
    none of the above                 none of the above

    3.                                8.

    c x 7 = 21 Circle Answer          s / 12 = 6 Circle Answer 
    c = 2                             s = 18 
    c = 3                             s = 6 
    c = 4                             s = 72 
    c = 14                            s = 70 
    none of the above                 none of the above

    4.                                9.

    d / 8 = 4 Circle Answer           x + 10 = 110 Circle Answer 
    d = 12                            x = 100 
    d = 2                             x = 11 
    d = 32                            x = 120
    d = 4                             x = 999 
    none of the above                 none of the above

    5.                                10.

    n + 13 = 24 Circle Answer         y + 48 = -50 Circle Answer 
    n = 11                            y = 2 
    n = 14                            y = -98 
    n = 9                             y = -88 
    n = 37                            y = 108 
    none of the above                 none of the above


    References:
      http://hyperphysics.phy-astr.gsu.edu/hbase/alg2.html#ag
      http://www.mathleague.com/help/algebra/algebra.htm