Zrp200/linear1

module Linear1
  class System
    include Enumerable
    attr_reader :e1, :e2
    def each
      yield(@e1), yield(@e2)
    end
    def initialize equation1, equation2
      @e1, @e2 = equation1, equation2
    end
    def execute x
      final = Array.new
      [@e1, @e2].each {|equation| final << equation.execute(x)}
      final
    end
    def intersection
      e = @e1.to_standard, @e2.to_standard
      e[1].a * (e[0].c - e[0].b), e[0].b * (e[1].c - e[1].a)
    end
    alias solution intersection
  end
end