Answer: r<5/3 *The answer must be have a positive sign and as a fraction.*
Explanation:
First, switch sides of an equation.
-9r-6>-21
Then, add by 6 both sides of an equation.
-9r-6+6>-21+6
Simplify by equation.
-9r>-15
Multiply by -1 both sides of an equation. It can also reverse inequality.
(-9r)(-1)<(-15)(-1)
Simplify.
9r<15
Divide by 9 both sides of an equation.
9r/9<15/9
Finally, simplify by equation.
r<5/3
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