Question

29-Resolva as equações
a)x/2 - x/4 =1/12
b)x/4 + 7 = x/2 + 5
c)x/3 + 4 = 2x
d)x/6+x/4=x/3-1
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Answer 1

Explicação passo-a-passo:

a)

$\frac{x}{2} - \frac{x}{4} = \frac{1}{12}$

$6x - 3x = 1$

$3x = 1$

$x = \frac{1}{3}$

b)

$\frac{x}{4} + 7 = \frac{x}{2} + 5$

$x + 28 = 2x + 20$

$x - 2x = 20 - 28$

$- x = - 8$

$x = 8$

c)

$\frac{x}{3} + 4 = 2x$

$x + 12 = 6x$

$x - 6x = - 12$

$- 5x = - 12$

$x = \frac{12}{5}$

d)

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

$2x + 3x = 4x - 12$

$5x = 4x = - 12$

$5x - 4x = - 12$

$x = - 12$