How do you solve $-21 = -r -5$ ?

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Answer 1 · 2018-03-19T19:09:38

$r = 16$

To calculate $(r)$ , we must isolate the variable onto one side:

$-21 = -(r) - 5$

Change sides

$-(r) - 5 = -21$

Add $5$ to both sides

$-(r) -5 + 5 = -21 + 5$

At this point we simplify both sides:

$-(r) = -16$

And from here, we multiply both sides by $(-1)$ to get our final answer in terms of positive $r$ .

$r = 16$

How do you solve -21 = -r -5-21 = -r -5?