Question

cuanto es 6x-2(x-3)=12

Answer 1

6X - 2(X - 3) = 12
6X - 2X + 6 = 12
6X - 2X = 12 - 6
4X = 6
X = 6/4 = 3/2
X = 1,5.

Comprobación:
6(1,5) - 2(1,5 - 3) = 12
9 - 2(-1,5) = 12
9 + 3 = 12
12 = 12   ---> OK. comprobación correcta.

Answer 2

6x - 2(x - 3) = 12

6x - 2x + 6 = 12

4x = 12 - 6

4x = 6

x = 6/4 simplificamos la mitad

x = 3/2

Solución : 

x = 3/2