Answer
$9(6+x)=1$
Work Step by Step
Often you can rewrite a sentence as an equation by simply reading left to right and transforming each word or phrase into a corresponding term or operation.
$\underbrace{The\ product\ of\ 9\ and}\ \underbrace{the\ sum\ of\ 6\ and\ x}\ \underbrace{is}\ \underbrace{1}.$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 9\times\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (6+x)\ \ \ \ \ \ \ \ \ \ \ \ \ =\ \ \ \ \ 1$
"Product" means you are going to multiply.
"Sum" means you are going to add.
"Is" means equals.
Since 9 is being multiplied by a sum, put the sum in parentheses so that it will be evaluated first. The multiplication sign can be eliminated as it is implied when the 9 is adjacent to the parentheses.
