Question

Using the linear combination method, what is the solution to the system of linear equations 7 x minus 2 y = negative 20 and 9 x + 4 y = negative 6? (–3, 2) (–2, 3) (2, –3) (3, –2)

Answer 1

(-2,3)

Explanation:

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Answer 2

(-2, 3)

Explanation:

(7x-2y= -20)2

9x+4y-6

14x-4y=-40

9x+4y-6

23x= -46

x= -2

9(-2)+4y= -6

-18+4y= -6

4y= -6+18

4y=12

y=3

so,(-2,3)