Question

5x-9y=-4 7x-3y=4 me ayudan​

Answer 1

Respuesta:

$5 \times 1 - 9 \times 1 = 5 - 9 = - 4 \\ 7 \times 1 - 3 \times 1 = 1 \\ 7 - 3 = 4$

x=1

y=1

Explicación paso a paso:

$5x - 9y = - 4 \\ 7x - 3y = 4 \: \: \: ( \times - 3) \\ \\ - 21 + 9y = - 12 \\ 5x - 9y = - 4 \\ - 16x = - 16 \\ 16x = 16 \\ x = 16 \div 16 = 1 \\ x = 1 \\ 5x - 9y = - 4 \\ 5 \times 1 - 9y = - 4 \\ 5 - 9y = - 4 \\ - 9y = - 4 - 5 \\ - 9y = - 9 \\ 9y = 9 \\ y = \frac{9}{9} = 1$

espero te sirva