Question

Hallar " x + y " si: ( 2x - 7y; 5 ) = ( 20; x - y )

Answer 1

Explicación:

( 2x - 7y; 5 ) = ( 20; x - y )

2x - 7y = 20

X - y = 5

X = 5 + y

2(5 +y) - 7y = 20

10 + 2y - 7y = 20

-5y = 10

Y = - 2

X = 5 - 2

X = 3

(x + y) = 1