Предмет: Математика, автор: DachutkaMichutka

Решите уравнения:
а)4,72-2,5х=2х+2,92; б)5/8y-3/4=2y-2.2/5(две целых две пятых);

Ответы

Автор ответа: pyffik
0
4,72-2,5х=2х+2,92
-2,5х-2х=2,92-4,72
-4,5х= -1,8
х=0,4
.............................
5/8=0,625    3/4=0,75     2 2/5=2,4
0,625у-0,75=2у-2,4
0,625у-2у= -2,4+0,75
- 1,375у= - 1,65
у=1,2
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