求教一道SAT的数学题:
Foradogthatweighswpoundsandisxincheslongtoqualifyforacertaincompetition,thedifferencebetweenwand1.5xcanbenomorethan5.Ifadogwithlength24inchesqualifiesforthecompetition,whatisonepossibleweight,inpounds,ofthisdog?
疑问:我答案求对了,但是我看SAT官方提供的参考答案是31