найдите корень уравнение (х+2)+х=9 х+(7+х)=11 х+2х-5=40 х+(4+х)+х=16. Created by neznaika222. matematika-ru

найдите корень уравнение (х+2)+х=9 х+(7+х)=11 х+2х-5=40 х+(4+х)+х=16...

July 2022 2 2 Report

найдите корень уравнение
(х+2)+х=9
х+(7+х)=11
х+2х-5=40
х+(4+х)+х=16

lentomsk 1)(х+2)+х=9
х+2+х=9
2х=9-2
2х=7
х=9:2
х=4,5

2)х+(7+х)=11
х+7+х=11
2х=11-7
2х=4
х=4:2
х=2

3)х+2х-5=40
3х=40+5
3х=45
х=45:3
х=15

4)х+(4+х)+х=16
х+4+х+х=16
3х=16-4
3х=12
х=12:3
х=4

1 votes Thanks 2

lgolovizina (х+2)+х=9 х +(7+х)=11 х+2х-5 = 40
2х=7 2х=11-7 3х = 45
х = 7/2 х = 4/2 х =45:3
х = 3 1/2 х = 2 х = 15

х + (4+х) +х = 16
х+4+х+х = 16
3х = 16-4
3х=12
х=12:3
х = 4

3 votes Thanks 2

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