Question

5x+8y=21 4x + y = 6 pero con los metodos de suma y resta​

Answer 1

Explicación paso a paso:

$4x + y = 6 \: \: \: \times ( - 8) \\ - 32x - 8y = - 48 \\ 5x + 8y = 21 \\ - 27x = - 27 \\ 27x = 27 \\ x = \frac{27}{27} = 1 \\ x = 1 \\ 4x + y = 6 \\ y = 6 - 4x = 6 - 4 \times 1 = 6 - 4 = 2 \\ y = 2$

$5x + 8y = 5 \times 1 + 8 \times 2 = 5 + 16 = 21$

$4x + y = 4 \times 1 + 2 = 4 + 2 = 6$

espero te sirva