Question

determine o valor de x na proporção ​

Answer 1

Resposta:

2/7 = 12/x

Multiplica cruzado :

2 . x = 12 . 7

2x = 84

x = 84/2

x = 42

Espero ter ajudado

Answer 2

→ Cálculo :

$\\{\huge{\boxed{\begin{array}{lr} {\huge {\frac{2}{7}=\frac{12}{x} }} \\ \\ {2\cdot{x}=7\cdot12}\\\\{2x=84}\\\\{x=\frac{84}{2} }\\ \\ \boxed{\red{x=42}} \\ \end{array}}}}$