Question

5. Реши уравнения. 1000-y=45-3 231 + x = 909:3 75: x=50:10 20a-432 = 568 x+579= 309-3 x-465= 76-5 ​

Answer 1

Доброго ранку!

1000 - y = 45 - 3

1000 - у = 42

у = 1000 - 42

у = 958

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231 + x = 909 : 3

231 + х = 303

х = 303 - 231

х = 72

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75 : x = 50 : 10

75 : х = 5

х = 75 : 5

х = 15

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20a - 432 = 568

20а = 568 + 432

20а = 1000

а = 1000 : 20

а = 50

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x + 579 = 309 - 3

х + 579 = 306

х = 306 - 579

х = -273

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x - 465 = 76 - 5 ​

х - 465 = 71

х = 465 + 71

х = 536