Question

me ayudan porfis es para hoy ;)​

Answer 1

Respuesta:

A) y= 2. x= 3

B) y= -3. x=-2

C) y= 2. x= 1

Explicación paso a paso:

a. 3x+2y = 13

2x+3y = 12

2(3x+2y = 13)

-3(2x+3y = 12)

6x+4y = 26

-6x-9y = -36

Se suman las ecuaciones

-5y = -10

y = -10/-5

y = 2

2x+3(2) = 12

2x+6 = 12

2x = 12 -6

x = 6/2

x = 3

b. 2x-5y = 11

-6x+7y = -9

3(2x-5y = 11)

6x-15y = 33

-6x+7y = -9

Se suman las ecuaciones

-8y = 24

y = 24/-8

y = -3

2x-5(-3) = 11

2x+15=11

2x = 11-15

x = -4/2

x = -2

c. 2x+y = 4

5x-2y = 1

5(2x+y = 4)

-2(5x-2y = 1)

10x+5y = 20

-10x + 4y = -2

Se suman las ecuaciones

9y = 18

y = 18/9

y = 2

2x+(2) = 4

2x+2 = 4

2x = 4-2

x = 2/2

x = 1