Упростите выражение.                                                                                                                           0. 3х*5   7х-15х+5+2х   3

 Упростите выражение.                                                                                                                           0. 3х*5

7х-15х+5+2х

3a-(5a-1)

5a-b+(2a+4b)

13+7(х-5)

(х-3)*2 -(-х+7)

Ответ:

Ответ #2:

1)0.3*5=-х, х= -1.52)7х-15х+2х=-5, -6х=-5, х=0,85) 13+7х-35, 13-35=7х, -22=7х, х=-3,146)  2х-6-(-х+7), -6+7=-2х+х, 1=-1х, х=-1. 

Источник: https://znanija.com/task/252406