Question

Determine o valor de ¨x nas figuras

a)​

Answer 1

Resposta:

a)

$\frac{18}{9} = \frac{4}{x} \\ \\ 18x = 4 \times 9 \\ \\ 18x = 36 \\ \\ x = \frac{36}{18 } \\ \\ x = 2$

b)

$\frac{10}{15} = \frac{3x + 1}{5x - 2} \\ \\ 10(5x - 2) = 15(3x + 1) \\ \\ 50x - 20 = 45x + 15 \\ \\ 50x - 45x = 15 + 20 \\ \\ 5x = 35 \\ \\ x = \frac{35}{5} \\ \\ x = 7$

Bons Estudos!