Question

I need help with this math please.​

Answer 1

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:

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