Question

помогите !!!!!!!!!!!!!

Answer 1

Смотри ////////////-------

Answer 2

х-(7 5/9+5 1/6)=3,5

х-(68/9-31/6)=3,5

х-(136-93)/18=3,5

х-43/18=3 1/2

х=7/2+43/18

х=(63+43)/18

х=106/18

х=5 8/9

х-(-4,6+3 4/7)=-81/14

х-(-4 3/5+3 4/7)=-8 1/14

х-(-23/5+25/7)=-8 1/14

х-((-161+125)/35)=-8 1/14

х-(-36/35)=-8 1/14

х+36/35=-113/14

х=-113/14-36/35

х=(-565-72)/70

х=-637/70

х=-9 7/10

х=-9 1/10