Question

calcule o valor de X nas figuras a seguir​

Answer 1

a) 3 / 6 = x / 12 - x

3(12 - x) = 6 * x

36 - 3x = 6x

6x + 3x = 36

9x = 36

x = 36/9

x = 4

b) 10 / 15 = x / x + 3

10(x + 3) = 15 * x

10x + 30 = 15x

15x - 10x = 30

5x = 30

x = 30/5

x = 6