2. Questions Bank
  3. 7th Class
  4. Mathematics
  5. Simple Equations

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

  • question_answer
    3 is subtracted from a number and the difference multiplied by 4. If 20 is added to the product and the sum is divided by 2, the result is equal to 10. Find the number.

    A)  3     

    B)  4           

    C)  5                                

    D)  6

    Correct Answer: A

    Solution :

    (a) Let the number be\[x\]. Then according to the problem. \[\frac{(x-3)\times 4+20}{2}=10\] \[\Rightarrow \,\,(x-3)\times 4=0\Rightarrow x=3\] Cross-check as indicated in Ans. to Q. 17                          


You need to login to perform this action.
You will be redirected in 3 sec spinner