Предмет: Математика, автор: Аноним

помагите срочно!!!!!!!!!!!!!!!!!!

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Ответы

Автор ответа: гюйс

-2х+16=5х+30
-2х-5х=30-16
-7х=14
х= - 14:7
х= - 2

3 1/4 х-4 5/7=3 5/12 х-3 3/14
3 1/4 х-3 5/12х=4 5/7-3 3/14
3 3/12 х-3 5/12 х=4 10/14-3 3/14
- 1/6х=1 1/2
х= - 3/2*6/1
х= - 9

5/12-7/9 х=10 5/12-3х
-7/9 х+3х=10 5/12-5/12
2 2/9 х=10
х=10:20/9=10*9/20
х=9/2=4 1/2

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