Chapter 1.7, Problem 28P

Simplify each expression.

$-(-r+1)$

To determine

To find: The simplified form of the expression $-\left(-r+1\right)$ .

Answer to Problem 28P

The simplified form of the expression $-\left(-r+1\right)$ is $r-1$ .

Explanation of Solution

Given:

The expression is $-\left(-r+1\right)$ .

Calculation:

Solve the expression $-\left(-r+1\right)$ as follows:

  $\begin{array}{c}-\left(-r+1\right)=-1\left(-r\right)-1\left(1\right)\\ =r-1\end{array}$

Thus, the simplified form of the expression $-\left(-r+1\right)$ is $r-1$ .