Question

calcule o valor x das proporções

Answer 1

$a) \frac{x + 1}{2} = \frac{( x - 3)}{6} \\ (x + 1) \times 6 = 2 \times (x - 3) \\6x + 6 = 2x - 6 \\ 6x - 2x = - 6 - 6 \\ 4x = - 12 \\ x = \frac{ - 12}{4} \\ x = - 3 \\ \\ b) \frac{2x}{4} = \frac{(x + 6)}{ 3} \\ 2x \times 3 = 4 \times (x + 6) \\ 6x = 4x + 24 \\ 6x - 4x = 24 \\ 2x = 24 \\ x = \frac{24}{2} \\ x = 12$