2012÷2012又2012/2013+1/2014
=2012÷2012÷（2012÷2012+2012/2013÷2012）+1/2014
=1÷（1+1/2013）+1/2014
=1÷2014/2013+1/2014
=2013/2014+1/2014
=1谢了还有一道方程的2（X+1)=1-(X-4)2（X+1)=1-(X-4)2X+2=1-X+43X=3X=10125x3/4+1/8x8.25+12.5%0.125x3/4+1/8x8.25+12.5%=1/8×（3/4+8.25+1）=1/8×10=1.25 不要追问了哦谢谢了采纳啊采纳了啊好好