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posted by Alice Sunday, March 9, 2014 at 6:27pm.
Solve the inequality 4 ≤ 2c +7 ≤ 21
4 < = 2 c + 7 < = 21 Subbtract 7 4 - 7 < = 2 c + 7 - 7 < = 21 - 7 - 3 < = 2 c < = 14 Divide by 2 - 3 / 2 < = 2 c / 2 < = 14 / 2 - 3 / 2 < = c < = 7
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