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Solve the Following: the Teacher Tells the Class that the Highest Marks Obtained by a Student in Her Class is Twice the Lowest Marks Plus 7. the Highest Score is 87. What is the Lowest Score? - CBSE Class 7 - Mathematics

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Question

Solve the following:

The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. What is the lowest score?

Solution

Let the lowest score be l.

2 × Lowest marks + 7 = Highest marks

2l + 7 = 87

2l = 87 - 7 (Transposing 7 to R.H.S.)

2l = 80

Dividing both sides by 2

`(2l)/2 = 80/2`

l = 40

Therefore, the lowest score is 40

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics for Class 7 (2018 to Current)
Chapter 4: Simple Equations
Ex. 4.40 | Q: 2.1 | Page no. 91
Solution Solve the Following: the Teacher Tells the Class that the Highest Marks Obtained by a Student in Her Class is Twice the Lowest Marks Plus 7. the Highest Score is 87. What is the Lowest Score? Concept: Applications of Simple Equations to Practical Situations.
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