Вопрос школьника по предмету Математика
Помогите пожалуйста!!!
Вот задание:
Реши уравнения с комментированием и сделай проверку.
a)(3•m-20):5=50
б)480:(13-t)+20=100
Ответ учителя по предмету Математика
(3 м-20):5=50
перенёс вправо 5 и поменял знак : на *
3 м-20=50*5
3 м-20=250
перенёс вправо -20 и знак поменял на +20
3 м =250+20
3 м=270
м= 270:3
м=90
480:(13- т)+20=100
480:(13- т)=100-20
480:(13- т)=80
13- т=480:80
13- т=6
т=13-6
т=7
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Hi dear buyer.
i am really sad, a full refund has been return to your account, please kindly check and wait from Ali , need some working days.
For your order,I really suffer much much loss,I can tell you from my heart we did send out the order to you,
Could you please leave give me 5 stars for the detailed seller ratings?
We are the good seller, I hope you also are a good and honest buyer.
Also could you please pay me back after you receive the item?
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