8_1/17 - (х+2_3/17) = 3_9/17
х+2_3/17 = 8_1/17 - 3_9/17
х+2_3/17 =7_18/17 - 3_9/17
х+2_3/17 = 4_9/17
х= 4_9/17 - 2_3/17
х= 2_6/17
8_1/17 - (х+2_3/17) = 3_9/17
х+2_3/17 = 8_1/17 - 3_9/17
х+2_3/17 =7_18/17 - 3_9/17
х+2_3/17 = 4_9/17
х= 4_9/17 - 2_3/17
х= 2_6/17