r=1 or r=−5
Work Step by Step
4+abs(r+2)=7 4+abs(r+2)−4=7−4 abs(r+2)=3 r+2=3 or r+2=−3 r+2=3 r+2−2=3−2 r=1 r+2=−3 r+2−2=−3−2 r=−5
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