a) ([tex]\frac{3}{4} - \frac{1}{2}[/tex]) * 3 = ([tex]\frac{3}{4} - \frac{2}{4}[/tex]) * 3 = [tex]\frac{1}{4}[/tex] * 3 = [tex]\frac{1 * 3}{4}[/tex] = [tex]\frac{3}{4}[/tex]
b) [tex](\frac{1}{3} +\frac{1}{7} ) * 2 = (\frac{7}{21}+\frac{3}{21}) *2 = \frac{10}{21} *2= \frac{10*2}{21} = \frac{20}{21}[/tex]
c)[tex]\frac{3}{16} *3+\frac{1}{8}*3= \frac{3*3}{16} +\frac{1*3}{8} = \frac{9}{16} +\frac{3}{8} =\frac{9}{16} +\frac{6}{16} = \frac{15}{16}[/tex]
