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8th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    If \[x+y=6\] and \[3x-y=4,\]then \[x-y\] is equal to

    A)  \[x=6\]               

    B) 0

    C) 2                                 

    D) 4

    Correct Answer: A

    Solution :

    \[\left( 2,-\frac{5}{3} \right)\]                          ...(i) \[(0,0)\]                                    ...(ii) Adding (i) and (ii), we get \[4{{x}^{2}}-20x+25=0\] \[\frac{3}{2}\] \[\frac{3}{2}\]  \[\frac{7}{2}\]          


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