10х-6+6х+3-16=0
16х-19=0
16х=19
х=19/16=1 3/16
8/15 + 1/5 + (2/3)2 = 8/15 + 3/5 + 4/9 = 24/45 + 27/45 + 20/45 = 71/ 45 =
= 1 26/45
Так должно быть.............
1. -9:(-9)=1
2. -21:(-7)=3
3. -3•(-66)=198
4. -9-19=-28
5. -6:8=0.75
6. 0.72(1.1+2.86)=2,8512
7. -7.1+7.68:1.2=-0.7
8. -0.6
9. -4,24
10. 5,37•1,3•3,72=25,96932 или 5.37-1.3-3.72=0.35