How to solve these problems

Answer:
well i am on mobile so o cant do step by step process bbut i can give you answer
Step-by-step explanation:
answers,
1. 35/9 (3.88)
2. 599/91 (6.58)
3. -66
Answer:
[tex]\frac{\frac{14}{7}\cdot \:3+9}{9\left(\frac{18}{6}\div \frac{21}{3}\right)}[/tex]
[tex]\frac{14}{7} =2\\=2\cdot \:3+9[/tex]
[tex]=6+9[/tex]
[tex]=15[/tex]
[tex]9\left(\frac{18}{6}\div \frac{21}{3}\right)[/tex]
[tex]\frac{18}{6} =3[/tex]
[tex]\frac{21}{3} =7[/tex]
[tex]9(3\div 7)=\frac{3}{7}[/tex]
[tex]=9\cdot \frac{3}{7}=\frac{27}{7}[/tex]
[tex]\frac{27}{7} =3\frac{6}{7}[/tex]
[tex]=\frac{15}{3\frac{6}{7}}[/tex]
-------------
[tex]\frac{31}{\:7}+\frac{28}{13}[/tex]
[tex]LCM\: of \: 7 \:and \: 13 :91[/tex]
[tex]=\frac{403}{91}+\frac{196}{91}[/tex]
[tex]=\frac{403+196}{91}[/tex]
[tex]=\frac{599}{91}[/tex]
--------------
[tex]-3-21\cdot \frac{66}{22}[/tex]
[tex]\frac{66}{22} =3[/tex]
[tex]=-3-21\cdot \:3[/tex]
[tex]21\cdot \:3=63[/tex]
[tex]=-3-63[/tex]
[tex]=-66[/tex]
OAmalOHopeO