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7th Class Mathematics Simple Equations Question Bank Linear Equation in one Variable

  • question_answer
    If two -fifth of a number decreased by 12 is 50, what is the number?

    A)  \[162\text{ }\frac{1}{2}\]                     

    B)  \[185\text{ }\frac{1}{2}~~\]

    C)  155                             

    D)  160

    Correct Answer: C

    Solution :

    (c) \[\frac{2}{5}x-12=50\] \[\therefore \]\[\frac{2x}{5}=62\] \[\therefore \]\[x=\frac{62\times 5}{2}=31\times 5=155\]


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