Question

3×+4y=13
2×-5y=1

ayuda ​

Answer 1

Respuesta:

x = 3

y = 1

Explicación paso a paso:

3x + 4y = 13

2x - 5y = 1

4y = 13 - 3x

y = 13 - 3x

4

2x - 5y = 1

2x - 5(13 - 3x) = 1

4

8x - 5(13 - 3x) = 4

8x - 65 + 15x = 4

8x + 15x = 4 + 65

23x = 69

x = 69÷23

x = 3

3(3) + 4y = 13

9 + 4y = 13

4y = 13 - 9

4y = 4

y = 4÷4

y = 1

Comprobamos

2x - 5y = 1

2(3) - 5(1) = 1

6 - 5 = 1

3x + 4y = 13

3(3) + 4(1) = 13

9 + 4 = 13