r/(r-3.3)=12.2/7.34 r=8.28 求中间的计算过程

问题描述:

r/(r-3.3)=12.2/7.34 r=8.28 求中间的计算过程

r/(r-3.3)=12.2/7.34
12.2*(r-3.3)=7.34r
12.2r-7.34r=12.2*3.3
4.86r=40.26
r=40.26/4.86=8.284