(15+х)+х+(х-4)=50
(15+2х)+(х-4)=50
2х+(х-4)=50-15
2х+(х-4)=35
2х+х-4=35
3х-4=35
3х=35+4
3х=39
х=39:3
х=13 Ответ: 13
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
(15+х)+х+(х-4)=50
(15+2х)+(х-4)=50
2х+(х-4)=50-15
2х+(х-4)=35
2х+х-4=35
3х-4=35
3х=35+4
3х=39
х=39:3
х=13 Ответ: 13