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11-02-2020
Mathematics

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4x+9y =-19 -4x-7y=13

Respuesta :

bhuvna789456 bhuvna789456

17-02-2020

The solution is (x,y) = (2,-3).

Step-by-step explanation:

4x+9y = -19 ---------(1)

-4x-7y = 13 -----------(2)

2y = -6

The value of y is y= -6/2 = -3.

∴ y= -3, subsitute in any of the above equation.

Substituting y= -3 in eq (1),

⇒ 4x + 9(-3) = -19

⇒ 4x = -19 + 27

⇒ 4x = 8

x = 2

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