# How do you translate "7 less than twice a number and k" into a mathematical expression?

Jul 30, 2016

There are two different interpretations:

$2 x + k - 7 \text{ or } 2 \left(x + k\right) - 7$

#### Explanation:

In the absence of any punctuation which would indicate exactly what is meant, this statement could be read as:

"7 less than, twice a number and k"

"7 less than ...." means subtract 7 from a number.

"Twice a number means "2 times a number"
"Twice a number and $k$ means add $k$.

Use $x$ as the number.

Putting these phrases together gives

$2 x + k - 7$

the statement could also be read as:

"7 less than, twice, a number and k"

$2 \left(x + k\right) - 7$