Question

O valor de x na proporção x_12=10_3 E igual a.
30
50
75
120

Answer 1

3.x = 10.12

3x = 120

x=120/3

x= 40 ✓

Answer 2

$\large\boxed{\begin{array}{l} \rm{ \dfrac{x}{12} = \dfrac{10}{3} } \\ \\ \rm{3x = 10 \times 12} \\ \rm{3x = 120} \\ \rm{x = \dfrac{120}{3} } \\ \huge \boxed { \boxed{ \boxed{ \boxed{ \rm{x = 40}}}}}\end{array}}$