( 8 3\16+x) -7 3\4 = 24 7\8

Спасибо, исправила

( 8 3/16 + х) - 7 3/4 = 24 7/8
(131/16 + х) - 31/4 = 199/8
(131/16 + х) = 199/8 + 31/4
(131/16 + х) = 199/8 + 62/8
131/16 + х = 261/8
х = 261/8 - 131/16
х = 522/16 - 131/16
х = 391/16
х = 24,4375
х = 24  7/16