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Lisa [10]
4 years ago
9

I need help with this math please.​

Mathematics
1 answer:
Vanyuwa [196]4 years ago
4 0

Answer:

(13.4,-4.2)

Step-by-step explanation:

The given system has equations:

20x - 5y = 289

22x + 9y = 257

Multiply the top equation by 9 and

Multiply the second equation by 5:

180x - 45y = 2601

110x + 45y = 1285

Add the new equations.

290x = 3886

x = 13.4

Put this into the first equation to get:

20(13.4) - 5y = 289 \\ 268 - 5y = 289 \\  -  5y = 21 \\ y =  - 4.2

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