Помогите решить номер 4 первый столбик. Created by Karisha2100. matematika-ru

Помогите решить номер 4 первый столбик...

Karisha2100 @Karisha2100

June 2022 1 15 Report

Помогите решить номер 4 первый столбик

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Agetnor

Verified answer

1)
$(x-300)+800=1400 \\ x-300=1400-800 \\ x-300=600 \\ x=600+300 \\ x=900$

2)
$6400-(1700+y)=2500 \\ -1700-y=2500-6400 \\ -1700-y=-3900 \\ -y=-3900+1700 \\ -y=-2200 \\ y=2200$

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