Question

5x - 7 = 13
Cuanto es la x?

Answer 1

Respuesta:

x = 4

Explicación paso a paso:

$5x - 7 = 13 \\ 5x = 13 + 7 \\ \\ x = \frac{20}{5} \\ \\ x = 4$

Comprobamos

$5x - 7 = 13 \\ 5(4) - 7 = 13 \\ 20 - 7 = 13 \\ 13 = 13$

Answer 2

x - 7 = 13

13 + 7 = x

13 + 7 = 20

x = 20

20 - 7 = 13