解方程:[k-(16/3+21/2)]/(16/3+ 21/2)=20%

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解方程:[k-(16/3+21/2)]/(16/3+21/2)=20%解方程:[k-(16/3+21/2)]/(16/3+21/2)=20%解方程:[k-(16/3+21/2)]/(16/3+21/2

解方程:[k-(16/3+21/2)]/(16/3+ 21/2)=20%
解方程:[k-(16/3+21/2)]/(16/3+ 21/2)=20%

解方程:[k-(16/3+21/2)]/(16/3+ 21/2)=20%
[k-(16/3+21/2)]/(16/3+ 21/2)=20%
[k-(95/6)]/(95/6)=1/5
k-(95/6)=(95/6)*(1/5)
k=(95/6)*(1+1/5)
k=(95/6)*(6/5)
k=19

化简得:k-1=0.2 解得:k=1.2