Question

If $k+7=16$, then the value of $8k–72$ is:

• A. $0$
• B. $1$
• C. $112$
• D. $56$

Answer 1

The correct option is A

$0$

Explanation for the correct option:

Step 1: Calculate the value of $k$

The given equation is $k+7=16$.

It can be simplified as,

$k+7=16$

$\Rightarrow$ $k=16-7$

$\Rightarrow$ $k=9$

Step 2: Calculate the value of the given expression

The given expression is $8k–72$.

So, $8k–72=8\left(9\right)–72$ $\left[\because k=9\right]$

$\Rightarrow$$8k–72=72–72$

$\Rightarrow$$8k–72=0$

Hence, $8k–72=0$, so, option (A) is the correct option.