решить хотя бы 3 задчи. ​

32/8=4

32/4=8

8*4=32

1) 40*3=120(л)

2)760-120=640(л)

3)640/2=320 (л)

а)0.2t+1.7-0.54=0.22

1.9t-0.54=0.22

1.9t=0.22+0.54

1.9t=0.76

t=0.76/1.9

t=0.4

б)5.6z-2z-0.7z+2.65=7

2.9z+2.65=7

2.9z=7-2.65

2.9z=4.35

z= 4.35/2.9

z=1.5