Question

calcule x na imegem a seguir

Answer 1

10x = 15 x 10
10x = 150
x = 150/10
x = 15

Answer 2

$\frac{x}{12} = \frac{15}{10} \\ \\ 10x = 12 \times 15 \\ \\ 10x = 180 \\ \\ x = \frac{180}{10} \\ \\ x = 18$