Решите выражения : (а-1целая 18/19)-11/38=2, (18 целых 6/7+у)-12целых 2/3=8целых 1/7

[latex](a-1 \frac{18}{19} )- \frac{11}{38}=2[/latex] [latex](a-1 \frac{18}{19} )=\frac{11}{38}+2[/latex] [latex]a-1 \frac{18}{19}=2\frac{11}{38}[/latex] [latex]a=1 \frac{18}{19}+2\frac{11}{38}[/latex] [latex]a=1 \frac{36}{38}+2\frac{11}{38}[/latex] [latex]a=3 \frac{47}{38}[/latex] [latex]a=4 \frac{9}{38}[/latex] [latex](18\frac{6}{7}+y)-12\frac{2}{3}=8 \frac{1}{7} [/latex] [latex]18\frac{6}{7}+y=12\frac{2}{3}+8 \frac{1}{7} [/latex] [latex]18\frac{6}{7}+y=12\frac{17}{21}+8 \frac{3}{21} [/latex] [latex]18\frac{6}{7}+y=21\frac{20}{21} [/latex] [latex]y=21\frac{20}{21} -18\frac{6}{7}[/latex] [latex]y=21\frac{20}{21} -18\frac{18}{21}[/latex] [latex]y=3\frac{2}{21} [/latex]