Question

x + x + x = 30
x+y+y = 18
y-2z = 2
z+x+y=?

Answer 1

Respuesta:

$15$

Explicación paso a paso:

$x + x + x = 30$

$3x = 30$

$x = 10$

.................................................

$x + y + y = 18$

$10 + 2y = 18$

$2y = 18 - 10$

$2y = 8$

$y = 4$

........................................................

$y - 2z = 2$

$4 - 2z = 2$

$4 - 2 = 2z$

$2 = 2z$

$1 = z$

.........................................................

Ahora reemplazaremos:

$z + x + y$

$1 + 10 + 4$

$15$