Question

Resolva as equações::

a) x/2 - x/4 =1/2

b) x/4 + 7= x/2 +5

c) x/3 + 4= 2x

d) x/6 + x/4 = x/3 -1

Answer 1

a) 4/2 - 6/4= 1/2

b) 4/4 + 7= 6/2 + 5

c) 6/3 + 4 = 2.3

d) 12/6 + 8/4 = 15/3 - 1

Answer 2

Bom, vamos lá:
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$a) \frac{x}{2}- \frac{x}{4}= \frac{1}{2}$
$\frac{2x}{4}- \frac{x}{4}= \frac{2}{4}$
$\frac{x}{4} = \frac{2}{4}$
$x=2$
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$b) \frac{x}{4} +7= \frac{x}{2} +5$
$\frac{x}{4} - \frac{x}{2} =-2$
$\frac{x}{4} - \frac{2x}{4} =-2$
$-x=-2$
$x=-(-2)$
$x=2$
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$c) \frac{x}{3} +4=2x$
$\frac{x}{3} -2x=-4$
$-5x=-12 (MMC)$
$x= \frac{12}{5}$
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$d) \frac{x}{6} + \frac{x}{4} = \frac{x}{3} -1$
$2x+3x=4x-12 (MMC)$
$x=-12$
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Espero ter ajudado!