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02-05-2019
Mathematics

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solve..........20 = 5x + 10y

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Аноним Аноним

02-05-2019

5x + 10y = 20

-5x + 20 = 10y

-x/2 + 2 = y

y = 2 - x/2

20 - 10y = 5x

4 - 2y = x

x = -2y + 4

Answer:

x = -2y + 4

y = 2 - x/2

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