三道解方程。0.24÷x=0.6 7x=0.21×65(x-1.2)=3求学霸解答!跪求!
2.7x=0.21×67x=1.267x÷7=1.26÷7x=0.18
7x=0.21*67x=12.6 x=12.6/7 x=1.8
5(x-1.2)=3 x-1.2=3/5 x-1.2=0.6 x=0.6+1.2 x=1.8