все на левую сторону переносим
- (3/5 х) + 1/4х + 4/7 + 3/7 = 0
- (7/20 х) + 1 = 0
7/20х = 1
х = 1 / 7/20
х = 20/7
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все на левую сторону переносим
- (3/5 х) + 1/4х + 4/7 + 3/7 = 0
- (7/20 х) + 1 = 0
7/20х = 1
х = 1 / 7/20
х = 20/7