5x +2y + 4 = 2x +10 y +8 -2x auf jeder Seite
3x +2y +4 = 10y +8 -2y "
3x +4 = 8y +8 -4 "
3x = 8y +4 : 3 "
$${\mathtt{x}} = {\frac{\left({\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{y}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}}\right)}{{\mathtt{3}}}}$$
5x +2y + 4 = 2x +10 y +8 -2x auf jeder Seite
3x +2y +4 = 10y +8 -2y "
3x +4 = 8y +8 -4 "
3x = 8y +4 : 3 "
$${\mathtt{x}} = {\frac{\left({\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{y}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}}\right)}{{\mathtt{3}}}}$$