Question

000
se 1/4 de um numero, subtraido a cinco, e igual a terca parte desse numero, entao esse numero e?
A) 35
B) 20
C) 15
D) -60
E) -30

Answer 1

$\frac{1}{4}x - 5 = \frac{1}{3}x \\\\\frac{1}{4} - \frac{1}{3} = 5\\\\x(3-4/12) = 5\\-1x/12 = 5\\ -1x = 5*12\\-1x = 60\\x = -60$

Answer 2

$d) - 60$

$\frac{x}{4} - 5 = \frac{x}{3}$

$- 5 = \frac{x}{3} - \frac{x}{4}$

$- 5 = \frac{4x - 3x}{12}$

$- 5 \times 12 = 4x - 3x$

$- 60 = 1x$

$1x = - 60$

$x = - 60$