решите уравнение номер 216. Created by asi1092010. matematika-ru

решите уравнение номер 216...

asi1092010 @asi1092010

July 2021 1 13 Report

решите уравнение номер 216

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kateromanenko 15/(a+15)=3/7
15*7=3*(a+15)
105=3a+45
3a=60
a=20

4/5=(60-m)/40
4*40=(60-m)*5
160=300-5m
5m=140
m=28

(5x-7)*12=1/4
4*(5x-7)=12
20x-28=12
20x=40
x=2

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