Question

3) Determine o valor de x:
a) 2x - 9 = 0
b)2(x - 1) = 12 c) 2x - 16 = 0​

Answer 1

Olá,

a)

$2x - 9 = 0$

$2x = 9$

$x = \frac{9}{2}$

b)

$2(x - 1) = 12$

$x - 1 = \frac{12}{2}$

$x - 1 = 6$

$x = 6 + 1$

$x = 7$

c)

$2x - 16 = 0$

$2x = 16$

$x = \frac{16}{2}$

$x = 8$