Решите уравнение: 1. 4/9 * (2,7m - 9/4n) - 4,2 * (5/7m - 9,5n) =... 2. 3/14x - 2/7y -...

Question

Решите уравнение:
1. 4/9 * (2,7m - 9/4n) - 4,2 * (5/7m - 9,5n) =...
2. 3/14x - 2/7y - 5/7x - 8/22y =...

Answer 1

4/9·27/10m-4/9·9/4n-42/10·5/7m+42/10·5/10n=6/5m-n-6/2m+21/10n=6/5m-n-3m+21/10n=-1,8m-1,1n

Comments

5/7x-3/14x=-2
10/14х-3/14х=-2
1/2х=-2
х=-2 : 1/2
х=-4

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Это точно правильно?