Question

$\frac{3 + \times }{2} - \frac{3x + 5}{10} = \frac{2}{15}$
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Answer 1

(3 + x)/2 - (3x + 5)/10 = 2/15

3/2 + x/2 -3x/10 - 5/10 = 2/15

3/2 + x/2 -3x/10 - 1/2 = 2/15

x/2 -3x/10 + 3/2 - 1/2 = 2/15

x/2 -3x/10 + 1 = 2/15

x/2 -3x/10 = 2/15 - 1

x/2 -3x/10 = 2/15 - 15/15

1x/5 = -13/15

x = -13/15 . 5

x = -13/3

Resposta: x vale -13/3