Question

Somente a 24.................................

Answer 1

Explicação passo-a-passo:

a)

$12x - 2x = 8 - 5 \\ 10x = 3 \\ x = \frac{3}{10} \\ x = 0.3$

b)

$15 - 5x + 2x + 2 = - x + 5 \\ - 3x + x = 5 - 17 \\ - 2x = - 12 \\ x = \frac{ - 12}{ - 2} \\ x = 6$

c)

$5x + 20 - 20x = 5 \\ - 15x = 5 - 20 \\ - 15x = - 15 \\ x = \frac{ - 15}{ - 15} \\ x = 1$

d)

$- x + 8 - 4x = - 2x - 10 + 3x \\ - 5x - x = - 10 - 8 \\ - 6x = - 18 \\ x = \frac{ - 18}{ - 6} \\ x = 3$

e)

$\frac{2x}{3} - \frac{5x}{2} = \frac{4}{3} + \frac{1}{2} \\ \frac{4x - 15x}{6} = \frac{8 + 3}{6} \\ - 11x = 11 \\ x = \frac{11}{ - 11} \\ x = - 1$

f)

$\frac{36x}{30} - \frac{15x + 45}{30} = \frac{10x}{30} - \frac{30}{30} \\ 36x - 15x + 45 = 10x - 1 \\ 21x - 10x = - 1 - 45 \\ 11x = - 46 \\ x = \frac{ - 46}{11}$