The general form for slope intercept is ax+by=c. X=c/a and y=c/b.Now just put values like:

X= 7/2 and y= -7/5(- sign since -5).So the solution set is (7/2,7/5).Hope you have understood the process.

X= 7/2 and y= -7/5(- sign since -5).So the solution set is (7/2,7/5).Hope you have understood the process.