Question

existe u nº que somado com o triplo e igual ao dobro desse numero somado com doze o valor desse numero é?

Answer 1

x + 3x = 2x +12 >>> 4x - 2x =12 >>> 2x = 12 >>> x = 12/2 >>> X = 6

Answer 2

$\sf x+3x=2x+12$

$\sf 4x=2x+12$

$\sf4x-2x=12$

$\sf2x=12$

$\sf x=\dfrac{12}{2}$

$\boxed{\boxed{\sf x=6}}$