1 / x=9/10(交叉相乘) x / 5 =0.75 320.4 / x =60 x / (144/9)=1/16 9x=10 x=3.75 x=5034 x/16=1/16 x=10/9 x=1 x×(1-37.5%)=3/5 4分之x+3=3分之x-2有3分之2 x×0.625=0.6 x =0.375
急!十道方程题 加 五道应用题(方程解)
1 / x=9/10(交叉相乘) x / 5 =0.75 320.4 / x =60 x / (144/9)=1/16 9x=10 x=3.75 x=5034 x/16=1/16 x=10/9 x=1 x×(1-37.5%)=3/5 4分之x+3=3分之x-2有3分之2 x×0.625=0.6 x =0.375