What equals x in the equation (x + -6 = 12)

To solve just add 6 to 12 and you will get x=18:)

x=18

Step-by-step explanation:

(x + -6 = 12)

+6 +6

x=18

The answer to your question would be solve with elimination, as it would be the easiest method. 

We will multiply the first equation by 4, so we can eliminate the y variable.

#1 
#2 

After simplifying, we can use Linear Combination method to solve for the variables, which is adding both equations.

Linear Combination:
#1 () + ()
#2
#3 

After this, you can plug in x into the first equation, to find y:
#1  (Simplify)
#2 
#3 
#1 

Now we have our solution ordered pair, which is (-1, 2). Hooray!!