算術(shù)解法:
計(jì)劃人數(shù)=80÷(1+1/4)=80×4/5=64人;
方程解法:
設(shè)計(jì)劃人數(shù)x人,
x+1/4x=80
5/4x=80
x=80×4/5
x=64