Answer:
Step-by-step explanation:
KT because triangles KIT and KET are congruent ( mirror images).
Ans given below
-3r-12=-21
-3r=-21+12
-3r=-9
r=-9\-3
r=3
Hi there!
Pauline simplified the expression correctly.
Pauline made sure she used the distributive property and combined like terms after doing so.
Hope this helps !
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