Question

Calcule x na proporção a seguir:
$\frac{x + 1}{x + 2 } = \frac{10}{12}$
​

Answer 1

x+1/x+2 = 10/12

12(x+1) = 10(x+2)

12x+12 = 10x+20

12x -10x = 20 -12

2x = 8

x = 4