Question

Evaluate the expression when $x=-7$.

localid="1649145120345" $\left|-x\right|$

Short answer

The value of the expressionis 7.

Step-by-step solution

Step-1 – Absolute value of a number

Absolute value of any positive or negative number is always positive and equal to the magnitude of the number. The absolute value of a number N is denoted by $\left|N\right|$.

The absolute value of a number represents the distance of the number from 0 in the number line

Step-2 – Example of Absolute value

The absolute value of 3 is denoted by $\left|3\right|$and is equal to 3.

And the absolute value of $-4$is denoted by $\left|-4\right|$and is equal to 4.

Step-3 – Evaluate the expression

To evaluate the value of the expression $\left|-x\right|$, substitute $-7$ for x and simplify further as shown below,

$\begin{array}{l}\left|-x\right|=\left|-\left(-7\right)\right|\\ =\left|7\right|\\ =7\end{array}$

Thus, the value of the given expression is 7.