15 14/19+х+3 17/19=21 2/19
х+19 12/19=21 2/19
х=21 2/19- 19 12/19
х=1 9/19
15ц14/19+х+3ц17/19=21ц2/19
(15ц+3ц+((14+17)/19)+х=21ц2/19 {18ц31/19=19ц12/19}
19ц12/19+х=21ц2/19
х=21ц2/19-19ц12/19
х=1ц9/19
15 14/19+х+3 17/19=21 2/19
х+19 12/19=21 2/19
х=21 2/19- 19 12/19
х=1 9/19
15ц14/19+х+3ц17/19=21ц2/19
(15ц+3ц+((14+17)/19)+х=21ц2/19 {18ц31/19=19ц12/19}
19ц12/19+х=21ц2/19
х=21ц2/19-19ц12/19
х=1ц9/19