1.
[tex]a+b= 5 \frac{3}{4} =\ \textgreater \ a+b = \frac{23}{4} [/tex]
[tex]a-b= \frac{5}{4} =\ \textgreater \ a= \frac{5}{4}+b = \frac{4b+5}{4} [/tex]
[tex] \frac{4b+5}{4} + b= \frac{23}{4} =\ \textgreater \ 4b+5+4b=23=\ \textgreater \ 8b=18 =\ \textgreater \ b= \frac{18}{8} = \frac{9}{4} [/tex]
[tex]a= \frac{4b+5}{4} = \frac{4* \frac{9}{4}+5 }{4} = \frac{14}{4} = \frac{7}{2} [/tex]
2.
[tex] \frac{3*a}{16} = \frac{9}{2} =\ \textgreater \ 6*a=16*9=\ \textgreater \ a= 24[/tex]
