Question

Calcule o valor de "x" nas proporções :

Answer 1

Resolução da questão, veja:

Calcular “x”:

$\mathsf{\dfrac{x-2}{12}} = \mathsf{\dfrac{x}{20}}\\\\\\\\ \mathsf{12x = 20x-40}}\\\\\\\\ \mathsf{12x-20x = -40}}\\\\\\\\ \mathsf{-8x = -40}}\\\\\\\\\ \mathsf{x = \dfrac{-40}{-8}}\\\\\\\\\\ \large\boxed{\boxed{\boxed{\boxed{\boxed{\mathsf{x = 5.}}}}}}}}}}}}}}}}}}}}}}}$

Ou seja, o valor de x nessa proporção é igual a 5.

Espero que te ajude '-'

Answer 2

5X-10=3X/60 CORTA O 60
5X-10=3X
5X-3X=10
2X=10
X=10/2
X=5