Answer:
c∈[-5,1]
Explanation:
12+c>7
12+c<13
c>-5
c<1
−5<c<1
Let's solve your inequality step-by-step.
7<12+c<13
7<c+12<13(Simplify all parts of the inequality)
7+−12<c+12+−12<13+−12(Add -12 to all parts)
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