(x-1)/0.3-(0.5-0.1x)/0.2=2 如何计算?
问题描述:
(x-1)/0.3-(0.5-0.1x)/0.2=2 如何计算?
要求写清步骤,如果好还会追分!
答
(x-1)/(3/10)-(0.5-0.1x)/(1/5)=2
10(x-1)/3-5(0.5-0.1x)=2
两边乘3
10x-10-7.5+1.5x=6
11.5x=6+10+7.5=23.5
x=23.5÷11.5
x=47/23