Answer :
[tex]6.7x=5.2x+12.3\\\\6.7x-5.2x=12.3\\\\1.5x=12.3 \ \ /\cdot 10\\\\15x=123\ \ /:15\\ \\x=\frac{123}{15}\\\\x=\frac{41}{5}\\\\x=8.2[/tex]
[tex]6.7x = 5.2x + 12.3\\6.7x- 5.2x = 12.3\\1.5x = 12.3\\x = \frac{12.3}{1.5} \\\\x=8.2\ \ Answer[/tex]