Remark The key step is just to subtract 5 from both sides. The pointed of the inequality still points away from the variable and towards the number. As long as that remains true, the correct answer can be found.
Solution 2.7 ≤ b + 5 Subtract 5 from both sides. 2.7 - 5 ≤ b - 2.3 ≤ b Write with the variable on the left. b ≥ - 2.3 <<<< answer
X=number of females 47-x=number of males # of males is 2*(number of females)-7: 47-x= 2x-7 add x to both sides: 47=3x-7 add 7 to both sides: 54=3x divide both sides by 3: x= 18 females 47-18= 29 males