Question

19 is seven plus three times a number. find the number

Answer 1

Let's use the variable x to represent the missing number.

Three times a number is the same as "3x".

Seven plus three times a number is equal to "7 + 3x"

Then, this expression is equal to 19, so let's write the corresponding equation:

$19=7+3x$

Now, solving the equation for x, we have:

$\begin{gathered} 7+3x=19 \\ 3x=19-7 \\ 3x=12 \\ x=\frac{12}{3} \\ x=4 \end{gathered}$

Therefore the number is 4.