Question

5x-3y=7
4x+7y=15
porfa es para hoy

Answer 1

Respuesta:

x = 2

y = 1

Explicación paso a paso:

x = 2

y = 1

4x + 7y = 15

5x - 3y = 7

4x + 7y = 15

4x = -7y + 15

x = (-7y + 15)/4

5 [(-7y + 15)/4 ]- 3y = 7

(-35y + 75)/4 - 3y = 7

-35y + 75 - 3y = 7 (4)

-35y + 75 - 12y = 28

-47y = 28 -75

-47y = -47

y = -47/-47

y = 1

4x + 7y = 15

4x + 7(1) = 15

4x + 7 = 15

4x = 15 -7

4x = 8

x = 8/4

x = 2

4x + 7y = 15

4(2) + 7(1) = 15

8 + 7 = 15

5x - 3y = 7

5(2) - 3(1) = 7

10 - 3 = 7