x-25%x=270.75x=27x=27÷0.75x=36
x-25%x=27x-x*1/4=27x*(1-1/4)=27x*3/4=27x=27*4/3x=36希望对您有所帮助如有问题,可以追问。谢谢您的采纳
x-25%x=2775%x=273/4x=27x=36