0, \\ \log_738x=\log_7(19\cdot3), \\ 38x=19\cdot3, \\
x= \frac{19\cdot3}{38} , \\ x= \frac{3}{2}, \\ x=1,5. " alt="\log_7x+\log_738=\log_719+\log_73, \\ x>0, \\ \log_738x=\log_7(19\cdot3), \\ 38x=19\cdot3, \\
x= \frac{19\cdot3}{38} , \\ x= \frac{3}{2}, \\ x=1,5. " align="absmiddle" class="latex-formula">