Сделайте уравнение 1) 419 - ( у- 9) =36 2)92 -( 17 - б)=89
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09.09.2019 18:40
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у-9=419-36
у-9=383
у=383+9
у=392
92-(17-Б)=89
17-б=92-89
17-б=3
б=17-3
б=14
419-у+9=36
428-у=36
-у=36-428
-у=-392
у=392
2) 92-(17-b)=89
92-17+b=89
75+b=89
b=89-75
b=14