Question

15 more than five times a number is equal to the difference between -57 and three times the number find the number

Answer 1

Let the number = x

The five times the number will be 5x

15 more than five times a number will be = 5x + 15

the difference between -57 and three times the number will be -57 - 3x

So,

$5x+15=-57-3x$

Solve for x:

$\begin{gathered} 5x+3x=-57-15 \\ 8x=-72 \\ \\ x=-\frac{72}{8}=-9 \end{gathered}$

So, the answer will be the number = -9