Question

⚠️⚠️⚠️ urgente ⚠️⚠️⚠️

Answer 1

Resposta:

a)

$\frac{x + 7}{4} = \frac{11 - x}{2} \\ \\ 4(11 - x) = 2(x + 7) \\ \\ 44 - 4x = 2x + 14 \\ \\ 2x + 14 = 44 - 4x \\ \\ 2x + 4x = 44 - 14 \\ \\ 6x = 30 \\ \\ x = \frac{30}{6} \\ \\ \orange{x = 5}$

b)

$\frac{x + 3}{12 - x} = \frac{2}{3} \\ \\ 3(x + 3) = 2(12 - x) \\ \\ 3x + 9 = 24 - 2x \\ \\ 3x + 2x = 24 - 9 \\ \\ 5x = 15 \\ \\ x = \frac{15}{5} \\ \\ \orange{ x = 3}$

c)

$\frac{18}{8+x} = \frac{2}{x} \\ \\ 18x = 2(8 + x) \\ \\ 18x = 16 + 2x \\ \\ 18x - 2x = 16 \\ \\ 16x = 16 \\ \\ x = \frac{16}{16} \\ \\ \orange{x = 1}$

d)

$\frac{2 - 2x}{3x} = -\frac{1}{3} \\ \\ - 3x = 3(2 - 2x) \\ \\ - 3x = 6 - 6x \\ \\ - 3x + 6x = 6 \\ \\ 3x = 6 \\ \\ x = \frac{6}{3} \\ \\ \orange{x = 2}$

Bons Estudos!