Question

$4$ is added to a number and the sum is multiplied by $5$. If $20$ is subtracted from the product and the difference is divided by $8$, then the result is equal to $10$. The number is:

• A. $8$
• B. $20$
• C. $1$
• D. $16$

Answer 1

The correct option is D $16$

Let the number is $x$
$\frac{(x+4)\times 5-20}{8}=10$
$(x+4)\times 5-20=80$
$(x+4)\times 5=100$
$(x+4)=100÷5$
$x+4=20$
$x=20-4$
$x=16$