Вопрос школьника по предмету Математика
Помогите пожалуйста Реши уравнения 5у-72=48-3у 53*( х-961)=3975 (k=2958)/87=134 69+4m=2m+153 выполни проверку найденных корней (помогите очень срочно )
Ответ учителя по предмету Математика
5y-72=48-3y
5у+3у=48+72
8у=120
у=120:8
у=15
Проверка:
5*15-72=48-3*15
75-72=48*45
3=3
53×(x-961)=3975
х-961=3975:53
х-961=75
х=75+961
х=1036
Проверка:
53*(1036-961)=3975
53*75=3975
3975=3975
(k+2958):87=134
к+2958=134*87
к+2958=11658
к=11658-2958
к=8700
Проверка:
(8700+2958):87=134
11658:87=134
134=134
69+4m=2m+153
4м-2м=153-69
2м=84
м=84:2
м=42
Проверка:
69+4*42=2*42+153
69+168=84+153
237=237
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