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Selesaikan persamaan linear serentak berikut. 2x + y = -5 3x - 4y = 9
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2 votes
Selesaikan persamaan linear serentak berikut.
2x + y = -5
3x - 4y = 9

User Costi
by
7.4k points

1 Answer

2 votes

Answer:

(-1;-3)

Explanation:


\left \{ {{4(2x+y)=4*(-5)} \atop {3x-4y=9}} \right. \ => \ \left \{ {{8x+4y=-20} \atop {3x-4y=9}} \right. \ => \ \left \{ {{11x=-11} \atop {2x+y=-5}} \right. \ => \ \left \{ {{x=-1} \atop {y=-3}} \right.

User Darrel Miller
by
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