So by using the distributive property we can solve this problem.
6 ( 12 + (-4)
Distributive property is when we take the 6 and multiply it by every number in the parentheses.
So....
6 x 12 = 72
6 x (-4) = (-24)
Now we have already taken care of the 6, and it can disappear from our equation.
And we plug in what we have left with our + sign.
72 + (-24)
Now solve..
72 + (-24) = 48
Answer = 48
Good Luck! :)