Question

Sustitución de 7x-9=8y 3y+10=-4x

Answer 1

Respuesta:

x = -1

y = -2

Explicación paso a paso:

7x - 9 = 8y

3y + 10 = -4x

7x - 9 = 8y

7x = 8y + 9

x = 8y/7 + 9/7

3y + 10 = -4x

3y + 10 = -4 * ( 8y/7 + 9/7 )

3y + 10 = -32y/7 - 36/7

3y + 32y/7 = -36/7 - 10

7,57y = -15,14

y = -15,14 / 7,57

y = -2

x = 8y/7 + 9/7

x = (8 *-2) / 7 + 9/7

x = -16/7 + 9/7

x = -1