Question

ACTIVIDAD: Resolver las siguientes ecuaciones:



a. x + 2 = 7



b. 2 x = 12



c. 4 x = 2 x + 8



d. 3 x = 12 - x



e. x – 8 = 2 – x



f. 5 x + 1 = 3 x – 4​

Answer 1

Respuesta:

$a. \: \: x + 2 = 7 \\ x = 7 - 2 \\ x = 5$

$b. \: \: 2x = 12 \\ x = \frac{12}{2} \\ x = 6$

$c. \: \: 4x = 2x + 8 \\ 4x - 2x = 8 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

$d. \: \: 3x = 12 - x \\ 3x + x = 12 \\ 4x = 12 \\ x = \frac{12}{4} \\ x = 3$

$e. \: \: x - 8 = 2 - x \\ - 8 - 2 = - x - x \\ - 10 = - 2x \\ \frac{ - 10}{ - 2} = x \\ 5 = x$

$f. \: \: 5x + 1 = 3x - 4 \\ 5x - 3x = - 4 - 1 \\ 2x = - 5 \\ x = - \frac{5}{2}$