Решите ур-е:
5/8+x=12/15. Z-7/8=1/16

[tex] \frac{5}{8} +x= \frac{12}{15}[/tex]
[tex]x= \frac{12}{15}-\frac{5}{8}=\frac{8*12-5*15}{15*8}= \frac{96-75}{120} = \frac{21}{120} = \frac{7}{40} [/tex]

[tex]z- \frac{7}{8} = \frac{1}{16} [/tex]
[tex]z = \frac{1}{16} +\frac{7}{8}= \frac{1+2*7}{16}= \frac{1+14}{16} = \frac{15}{16} [/tex]