Question

7x +9y = 30
5x - 8y= 7

Answer 1

Respuesta:

x = -9/7y+30/7

x =8/5y+7/5

Explicación paso a paso:

7 x + 9 y- 30 = 0

( 7 ) ⋅ x + ( 9 y- 30 ) = 0

x =- ( 9 y- 30 )/7

x = -9/7y+30/7

5 x - 8 y- 7 = 0

( 5 ) ⋅ x + ( - 8 y- 7 ) = 0

x =- ( - 8 y- 7 /)5

x =8/5y+7/5