96/(X+12)+40/60=96/X 怎么做...要过程~快快~急~

分类: 作业答案 • 2022-05-21 09:07:46

问题描述：

96/(X+12)+40/60=96/X 怎么做...要过程~
快快~急~

答

96/(X+12)+40/60=96/X96/(X+12)+2/3=96/X3x*96+2x(x+12)=96*3(x+12)288x+2x²+24x=288x+34562x²+24x-3456=0x²+12x-1728=0(x-36)(x+48)=0x=36,x=-48