Question

(84.9-x)*38=36.86 ; (91.2 / x)+84.79=92.79

Answer 1

84.9*38 - 38х=36.86

3226.2 - 38х=36.86

-38х=-3189.34

х=-83.93

наверно так....

 

Answer 2

(84,9-x)*38=36,86

3226,2-38х=36,86

-38х=36,86-3226,2

-38х=-3189,34

х=-3189,34/(-38)

х=83,93

 

(91,2 / x)+84,79=92,79

91,2/х=92,79-84,79

91,2/х=8

х=91,2/8

х=11,4