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16-10-2017
Mathematics

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Solve this system of linear equations. -14x + 11y = 23 7x - 3y = 37
x=? y=?

Respuesta :

16-10-2017

-14x + 11y = 23
+2(7x - 3y = 37)
----------------------
0 + 5y = 97
y = 97/5
y = 19.4

7x - 3(19.4) = 37
7x - 58.2 = 37
7x = 37 + 58.2
7x = 95.2
x = 95.2/7
x = 13.6

Check

-14(13.6) + 11(19.4) = 23
-190.4 + 213.4 = 23

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