Question

You bought a magazine for $7 and some notepads for $5 each. You spend a total of $27 how many notepads did you buy.

Answer 1

From the information available, some magazines (m) and some notepads (n) were bought.

If you bought a magazine for $7, then mathematically that would be;

$\begin{gathered} 1\times m=7 \\ m=7 \end{gathered}$

Also, if you bought some notepads for $5 each, that would be expressed as;

$5\times n=5n$

This represents 5 dollars times every given number of notepads, hence we would have;

$\begin{gathered} m+5n=27 \\ \end{gathered}$

Note that one magazine was bought which is why we have m = 7. We shall now substitute for thw value of m;

$\begin{gathered} m+5n=27 \\ 7+5n=27 \\ \text{Subtract 7 from both sides;} \\ 7-7+5n=27-7 \\ 5n=20 \\ \text{Divide both sides by 5;} \\ \frac{5n}{5}=\frac{20}{5} \\ n=4 \end{gathered}$

The value of n = 4

ANSWER:

This means you bought 4 notepads