Реши уравнение: 5/7 6/7х+3/7 - 1/2 = 1/6

Question

Реши уравнение: 5/7 6/7х+3/7 - 1/2 = 1/6

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Answer 1

5/7 : 6/7х + 3/7 -1/2 = 1/6
5/7 : 6/7х= 1/6 - 3/7 +1/2
5/7 : 6/7х = 7/42 - 18/42 + 21/42
5/7 : 6/7х=10/42
6/7х=5/7 : 10/42
6/7х=5/7 * 42/10
6/7 х = 6/2
х= 6/2 : 6/7
х= 6/2 * 7/6
х=7/2
х=3  1/2