Question

3×+4y=-10,2×-5y=5 metodo de igualacion​

Answer 1

Respuesta:

3x + 4y = -10

2x - 5y = 5

3x + 4y = -10

3x - 4y = -10 - 4y

3x = -10 - 4y

x= (-10 - 4y)/ 3

Hallamos y:

2x - 5y = 5

2(-10 - 4y)/ 3 = 5 + (5y)

-20 - 8y = 3(5 + 5y)

-20 - 8y = 15 + 15y

-20 - 15 = 15y + 8 y

-35 = 23y

-35/23 = y

Hallamos x

x = (-10 - 4y)/3

x = (-10 - 4(-35/23))/3

x = -30/23