Упростите, если х = 0,75 1 1/9(3х-9)-2 1/3(х-1,8)

Question

Упростите, если х = 0,75
1 1/9(3х-9)-2 1/3(х-1,8)

Answer 1

33/9x-99/9-7/3x+21/5=33/9x-21/9x=4/3x-11+21/5=4/3x-11/1+21/5=
=4/3x-55/5+21/5=4/3x-34/5=4/3*3/4-34/5=-34/5=-6 4/5.