解方程组:2(x-150)=5(3y+50),20%x+28%y=80%×180
2019-05-28
解方程组:2(x-150)=5(3y+50),20%x+28%y=80%×180
优质解答
2x-300=15y+250,20x+28y=14400,2x-15y=550,2x+2.8y=7200,17.8y=6650,y=66500/178=373.6,x=3076.97
2x-300=15y+250,20x+28y=14400,2x-15y=550,2x+2.8y=7200,17.8y=6650,y=66500/178=373.6,x=3076.97