Question

1/2{1/3[1/20x-1/2-6]+x}=1怎么解?

Answer 1

1/2{1/3[1/20x-1/2-6]+x}=1

1/6(1/20x-13/2)+1/6x=1

x/120-13/12+x/6=1

21x/120=25/12

21x/10=25

21x=250

x=250/21