Ok so first you would want to multiply both sides by -5. P(-5)=(m+n/-5)-5 (So now do the multiplication) -5p= m+n (You got rid of the -5 because -5 multiplied by -5 is 1 and if you put one under m+n, it would still not change) Now, isolate the n. -5p-m=n < That would be your answer :) I really hope this helped :)
