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  3. 8th Class
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  5. Linear Equations in One Variable

8th Class Mathematics Linear Equations in One Variable Question Bank Linear equations in One Variable

  • question_answer
    If \[\frac{1}{3}\] of a number is 10 less than the original number, then the number is_____.

    A)  30                  

    B)         15                  

    C)  10                  

    D)         27                  

    Correct Answer: B

    Solution :

    Let the number be\[x\]. According to question, we have \[x=\frac{1}{3}x+10\] \[\Rightarrow x-\frac{1}{3}x=10\Rightarrow \frac{3x-x}{3}=10\] \[\Rightarrow \frac{2x}{3}=10\Rightarrow x=\frac{10\times 3}{2}=15\] Hence, the number is 15.


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