Reply To: i need help on how to solve this problem

  • 641489f496fce bpthumb

    D2

    Member
    December 20, 2022 at 9:04 am

    For the purpose of the equations, I’ll call Andre and Bob a and b respectively.

    a – 20 = b + 20 (equation 1)

    2(b – 22) = a + 22 (equation 2)

    We can juggle those around for

    a = b +40 (equation 1r (re-arranged)) and

    2b – 44 = a + 22 so 2b – 66 = a (equation 2r (rearranged))

    The equations are now:

    a = b + 40 (new equation 1) and

    a = 2b – 66 (new equation 2)

    Substitute from new equation 1 to new equation 2:

    b + 40 = 2b – 66 so 40 = b – 66 making b = 106.

    Plug b = 106 into new equations 1 and 2 for:

    a = 106 + 40 (new equation 1) and

    a = 212 – 66 (new equation 2)

    This gives a = 146 and b = 106

    avataravataravataravatar
error: Alert: Content selection is disabled!!