2x-27%=1又5分之4 180%x+2又3分之1x=6.2 500xX75%/25=60 9.72-x=1又6分之1+90% 可以简便要简便哦

2x-27%=1又5分之42x=1.8+0.272x=2.07x=1.035 180%x+2又3分之1x=6.2(9/5+7/3)x=6.262/15x=6.2x=1.5 500xX75%/25=60 375x=60X25x=1250/375x=10/3 9.72-x=1又6分之1+90% x=9.72+1+1/6-90%x=7.82+1/6x=599/75额,我感觉你好多错啊!后面两题有误，已改正2x-27%=1又5分之42x=1.8+0.272x=2.07x=1.035 180%x+2又3分之1x=6.2(9/5+7/3)x=6.262/15x=6.2x=1.5 500xX75%/25=60 375x=60X25x=1500/375x=4 9.72-x=1又6分之1+90% x=9.72-1-1/6-90%x=7.82-1/6x=574/75