Question

3x-2y =12
2x+3y=21
me ajudem, por favor!​

Answer 1

3x-2y =12 ×(3)

2x+3y=21 ×(2)

9x-6y=36

+4x+6y=42

13x=78

x=78/13

x=6

2x+3y=21

$y = \frac{21 - 2x}{3} \\ y = \frac{21 - 2.6}{3} \\ y = \frac{21 - 12}{3} = \frac{9}{3} = 3$