1/7(7/8y+7)-3/4(2/9y+1 7/9)=1/2

[latex] frac{1}{7}( frac{7}{8}y+7)- frac{3}{4}( frac{2}{9}y+1 frac{7}{9})= frac{1}{2} [/latex][latex] frac{1}{8}y+1 - frac{3}{4}( frac{2}{9}y+frac{16}{9})= frac{1}{2} [/latex][latex] frac{1}{8}y+1 - frac{1}{6}y-frac{4}{3}= frac{1}{2}[/latex][latex] frac{1}{8}y - frac{1}{6}y= frac{1}{2}-1+frac{4}{3}[/latex][latex]- frac{1}{4}y = frac{5}{6}[/latex][latex]y = frac{5}{6}:(- frac{1}{24})[/latex][latex]y = frac{5}{6}*(- frac{24}{1})[/latex][latex]x=-20[/latex]