tonysanchezgordillo tonysanchezgordillo

17-01-2020
Mathematics

contestada

15. 3x – 4y = -1
5x + 2y = 7

Respuesta :

shanselvan shanselvan

18-01-2020

Answer:

x = 1, y = 1

Step-by-step explanation:

3x - 4y = -1

5x + 2y = 7

If we multiply the whole second equation by 2, we get:

10x + 4y = 14

Adding this to the first equation:

10x + 4y + 3x - 4y = 14 - 1

13x = 13

x = 1

Applying this to the second equation:

5 (1) + 2y = 7

2y = 2

y = 1

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