3 years ago

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

Mathematics

2 answers:

Ilya [14]3 years ago

6 0

Answer:

I have solve it in above picture

VLD [36.1K]3 years ago

3 0

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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