Question

$1)log _{3} (15-x)=log _{3 ^{2} 2) log_{4} (17-x)=log_{4} 13$

Answer 1

$1) \ \log_3 (15-x)=\log_3 2; \ \ \15-x=2; \ \ -x=2-15; \ \ -x=-13; \ \ x=13. \\ \\ 2) \ \log_4(17-x)=\log_4 13; \ \ 17-x=13; \ \ -x=13-17; \ \ -x=-4; \ \ x=4$