Question

Resuelve:
-x-3y=7
x+2y=8

Answer 1

Explicación paso a paso:

- x - 3y = 7

x = 8 - 2y

- ( 8 - 2y ) - 3y = 7

y = - 15

x = 8 - 2 x ( - 15 )

x = 38

( x , y ) = ( 38, - 15 )

- 38 - 3 x ( - 15 ) = 7

38 + 2x ( - 15 ) = 8

7 = 7

8 = 8

( x, y ) = ( 38 , - 15 )