Answer:
12) [tex]\frac{7}{3} = \frac{b}{18}[/tex]
[tex]3b = 126[/tex]
[tex]\frac{3b}{3} = \frac{126}{3}[/tex]
[tex]b = 42[/tex]
13) [tex]\frac{3.6}{m} = \frac{1.2}{3.6}[/tex]
[tex]1.2m = 12.96[/tex]
[tex]\frac{12m}{12} = \frac{12.96}{12}[/tex]
[tex]m = 10.8[/tex]
14) [tex]\frac{16}{10} = \frac{n + 2}{5}[/tex]
[tex]80 = 10n + 20[/tex]
[tex]80 - 20 = 10n +20 -20[/tex]
[tex]60 = 10n[/tex]
[tex]\frac{60}{10} = \frac{10n}{10}[/tex]
[tex]n = 6[/tex]
