1.35x*0.9-50-x=208
1.9683x-50-x=208
0.9683x-50=208
0.9683x=258
x约等于266.45我算的x是1200 有过程吗(1+35%)*x*90%-50-x=208 1.35*x*0.9-50-x=2081.35*x*0.9-x=2581.215*x-x=2580.215*x=258x=1200