How do you write the mathematical expression for "7 less than twice a number and k"?

May 16, 2016

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

Explanation:

Let "a number" be represented by $n$

"twice a number" $\rightarrow 2 n$

"twice a number and k" $\rightarrow 2 n + k$

"7 less than twice a number and k" $\rightarrow \left(2 h + k\right) - 7$