Question

х-(7 5/9-5 1/6)=-3,5

Answer 1

х-(7 5/9 - 5 1/6) = -3,5
х-7 5/9+5 1/6=-3 5/10
х=7 5/9-5 1/6-3 5/10(3 1/2)
х=68/9-31/6-7/2
х=(136-93-63)/18
х=-20/18
х=-1 1/9

Answer 2

там должно быть -10,4