Question

me ayudan porfavor ​

Answer 1

Respuesta:

$a). \: x - \frac{13x}{12} = \frac{5x}{18} + \frac{13}{12} \\ 36x - 39x = 10x + 39 \\ - 3 x = 10x + 39 \\ - 3x - 10x = 39 \\ - 13x = 39 \\ x = - 3$

$b). \: 3x - 4 = 5 + 3( \frac{x}{5} - 1) \\ 3x - 4 = 5 + \frac{3x}{5} - 3 \\ 3x - 4 = 5 + \frac{3x}{5} \\ 15x - 20 = 10 + 3x \\ 15x - 3x = 10 + 20 \\ 12x = 30 \\ x = \frac{5}{2}$

$c). \: 2 - 4( \frac{2x}{7} + \frac{1}{7} ) - \frac{3}{2} - x \\ 2 - 4x \frac{2x + 3}{7} - \frac{3}{2} - x \\ 2 - 4( \frac{2x + 1}{7} ) - \frac{3}{2} - x \\ 2 - \frac{8x + 4}{7} - \frac{3}{2} - x \\ \frac{1}{2} - \frac{8x + 4}{7} - x \\ \frac{7 - 2(8x + 4) - 14x}{14} \\ \frac{7 - 16x - 8 - 14x}{14} \\ \frac{ - 1 - 30x}{14} \\ - \frac{1 + 30x}{14}$

$d). \: 3x + 4 = x + 18 \\ 3x - x = 18 - 4 \\ 2x = 14 \\ x = 7$

$e). \: 2x - 3(x - 4) = x + 2 \\ 2x - 3x + 12 = x + 2 \\ - x + 12 = x + 2 \\ - x - x = 2 - 12 \\ - 2x = - 10 \\ x = 5$

$f). \: 4.( \frac{1}{4} + x) = 5 \\ 1 + 4x = 5 \\ 4x = 5 - 1 \\ 4x = 4 \\ x = 1$

$g). \: - 2x - 5 = - 11 \\ - 2x = - 11 + 5 \\ - 2x = - 6 \\ x = 3$