Question

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Answer 1

Given:

Total students, T=432.

The number of students to which the books were given, N=398.

Let x be the number of students still in need of book.

So, the expression for the total students T is,

`\begin{gathered} T=x+N \\ 432=x+398 \\ x+398=432 \end{gathered}`

Solving the above equation for x, we get

`\begin{gathered} x=432-398 \\ x=34 \end{gathered}`

Hence, x+398=432 and x=34 helps to find the number of students still in need of book.