What is the solution to linear equation? 2x+y=1 and 3x-y=-6

If im right, the answer to this linear equation is (-1,3) on a dotted/point graph.

First divide 60 by 25. 
60/25 = 2.4
Then multiple 2.4 and 3 to find how many hotdogs Joey can eat in a minute (60 seconds).
2.4*3 = 7.2
The answer must be rounded down as he hasn't completed his 8th hotdog yet, so Joey can eat 7 full hotdogs in a minute. 
To find how many he can eat in 10 minutes, multiply 7.2 by 10. 
10*7.2 = 72
Therefore, Joey can eat 72 hotdogs in 10 minutes.