Question

Se 1/2+a = 6/8, o valor de 9/1+a é..?

Answer 1

$\frac{1}{2} +a= \frac{3}{4}$

$a= \frac{3}{4} - \frac{1}{2}$

$a= \frac{3-2}{4} ~~a= \frac{1}{4}$

$\frac{9}{1} + \frac{1}{4} = \frac{37}{4}$

Answer 2

Vamos resolver a primeira equação:
$\frac{1}{2+a} = \frac{6}{8} => 6(2+a) = 8 => 12+6a = 8 => 6a = 8-12 => a = -\frac{4}{6}$

Agora substituindo:

$X = \frac{9}{1+(-\frac{4}{6})} = \frac{9}{(\frac{6-4}{6})} =\frac{9}{\frac{2}{6}} = X = \frac{9}{1}*\frac{6}{2} = \frac{54}{2} =>X=27$

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