How do you solve $abs(-3r)=9$ ?

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Answer 1 · 2016-11-11T13:08:39

The solution to the problem is $r = 3$ and $r = -3$

To solve this equation you need to solve two equations because of the absolute value signs. These equations are:

1) -3r = 9
2) -3r = -9

Solving equation 1 gives:

$-3r = 9$

$(-3r)/-3 = 9/-3$

$r = -3$

Solving equation 2 gives:

$-3r = -9$

$(-3r)/-3 = (-9)/-3$

$r = 3$

How do you solve abs(-3r)=9abs(-3r)=9?