Предмет: Математика, автор: ragib

чЕМУ РАВЕН КОРЕНЬ УРАВНЕНИЯ
1. 3х=28-х
2. 5х+12=8х+30

Ответы

Автор ответа: jekadva

6

3х=28-х
3x+x=28
4x=28
x=28:4
x=7
-------------
5х+12=8х+30
5x-8x=30-12
-3x=18
x=18:(-3)
x=-6

ragib: 6х-19=-х-10 и 0,7-0,2х=0,3х-1,8 и 0,1х+9=0,2х-4

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