(х+8ц.17/36)+7ц.31/36=25ц.1/36
х+8ц.17/36=25ц.1/36 - 7ц.31/36
х=25ц.1/36 - 7ц.31/36 - 8ц.17/36
х=8ц.25/36
(х+8ц.17/36)+7ц.31/36=25ц.1/36
х+8ц.17/36=25ц.1/36 - 7ц.31/36
х=25ц.1/36 - 7ц.31/36 - 8ц.17/36
х=8ц.25/36