Question

Решите уравнения 1/х+1/1целая2/7х=4/9, 2/1целых3/5х-1/х=1/12, 2/1целая1/3х-1/х=1/4

Answer 1

1/x+1/9x/7=4/9

1/x+7/9x=4/9

(9+7)/9x=4/9

16/9x=4/9

x=(16*9)/(9*4)

x=4