52/36 - (3х + 5) = 13
3х + 5 = 52/36 - 13
3х = 52/36 - 13 -5 52/36 = 1ц.16/36 = 1ц.4/9
3х = 1ц.4/9 - 18
3х = - 16ц.5/9
х = - 149/9 : 3
х = - 149/27
х = - 5ц 14/27
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6х/3 + 12ц.4/7 = 3 6/3х = 2х
2х = 3 - 12ц.4/7
2х = - 9ц.4/7
х = - 67/7 : 2
х = - 67/14
х = - 4ц.11/14
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