Solve be graphing , elimination , or substitution

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!!

Ithink the answer is $2.10