lorelai1940 lorelai1940

11-11-2020
Mathematics

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I need help fast... if answered Correctly I will mark brainliest

Choose the ordered pair which is the solution to: -2x + 7y = 17 and 3x - 4y = -19.

O (0,17/7)
O (-1,-2)
O (-5,1)
O (-1,3)

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sqdancefan sqdancefan

12-11-2020

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Answer:

(-5,1)

Step-by-step explanation:

To eliminate x, multiply the first equation by 3 and add 2 times the second equation.

3(-2x +7y) +2(3x -4y) = 3(17) +2(-19)

-6x +21y +6x -8y = 51 -38

13y = 13

y = 1 . . . . . matches the third answer choice

(x, y) = (-5, 1)

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