Question

5x + 2 y = -2
3x - 3y = 4
me ajudem por favor

Answer 1

Resposta:

5x+2y=-2(x3)

3x-3y=4(x2)

15x+6y= -6

6x-6y= 8

some termo a termo

21x= 2

x=2/21

5( 2/21)+2y=-2

10/21+2y=-2

2y=-2 -10/21

2y= -52/21

y=-52/21÷2

y= -52/21 × 1/2

y= -52/ 42

y= -26/21