Respuesta :
Answer:
r = -21
Step-by-step explanation:
-2(r + 9)
-2 (-21 + 9)
-21 + 9 = -12
-2(-12)
= 24
Answer:
-21
Step-by-step explanation:
Detailed explanation:
24 = -2(r + 9)
First, I did distributive property
24 = -2r -18
Now I will add 18 to both sides
42 = -2r
Now I will divide both sides by -2
-21 = r
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