jmontalbo20 jmontalbo20

21-01-2021
Mathematics

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2y +9 =x 9x- 8y=31
System of substitution

Respuesta :

21-01-2021

Answer:

x = -1

y = -5

Step-by-step explanation:

9(2y+9) - 8y = 31

18y + 81 - 8y = 31

10y + 81 = 31

10y = -50

y = -5

2(-5) + 9 = x

-10 + 9 = x

-1 = x

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21-01-2021

Answer:

I have solve it in above picture

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