Question

09.Ache o valor de X nas equações abaixo:
a) 3.x + 2 = x + 8.
b) 2.x - 1 = x + 5.
c) 4.x + 1 = 2.x + 7
d) 2.X + 1 = x + 2​

Answer 1

Resposta:

a)

$3x + 2 = x + 8 \\ 3x = 8 - 2 \\x = \frac{6}{3} = 2$

b)

$2x - 1 = x + 5 \\ 2x = 5 + 1 \\ x = \frac{6}{2} = 3$

c)

$4x + 1 = 2x + 7 \\ 4x - 2x = 7 - 1 \\ 2x = 6 \\ x = \frac{6}{2} = 3$

d)

$2x + 1 = x + 2 \\ 2x = 2 - 1 \\ x = \frac{1}{2} = 0.5$