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                x   y
                      2
            e)   4  6
                 x
                   y    4
                 6   5












               2(x 2y) 20 y    
            f)
                 7(x y) 16 3y    















                                                           a 1 x 2y b 3 0       
            2.   If the solution set of the linear equation system                    has infinitely many
                                                           7x 3y 5 0   

               points find the values of a and b.























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