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7th Class Mathematics Algebraic Expressions Question Bank Algebraic Expressions

  • question_answer
    From the sum of \[7x-2y-3z\] and \[3x+5y-8z,\]take away \[x-3z\].

    A)  \[9x-3y+8z\]

    B)  \[9x+3y-8z\]  

    C)  \[9x+3y+8z\]

    D)  \[9x-3y-8z\]

    Correct Answer: B

    Solution :

     The required difference \[=(7x-2y-3z)\] \[+(3x+5y-8z)-(x-3z)\] \[=(10x+3y-11z)-(x-3z)\] \[=9x+3y=8z\]


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