Question

Form an equation for the following situation: 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. (Take the lowest score to be $I$)

Answer 1

Let the lowest score be $I$.

According to the question,
Highest score in the class
$=2\times$ Lowest score $+7$
$=(2\times I)+7$
$=2I+7$

Also, Highest score in the class $=87$
Therefore, the required equation is $2I+7=87$.