Algebra PLEASE HELP!!

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  1. algebra

    The point of intersection of the graphs of the equations of the system Ax – 4y = 9 4x + By = –1 is (–1, –3). Explain how to find the values of A and B, then find these values.

    asked on March 18, 2012
  2. algebra

    Explain why the addition method might be preformed over the substitution method for solving the system 2x – 3y = 10 5x + 2y = 6 What is the solution of this system?

    asked on March 18, 2012