Elementary Algebra

The distributive property allows us to distribute anything multiplied by something inside of the parenthesis to whatever is inside of the parenthesis. Thus, we distribute the -7 to everything inside of the first set of parenthesis and the 4 to everything inside of the second set of parenthesis, giving us the equation 4n+36-7n+56=83. We now simplify: $-3n+92=83 \\\\ -3n=-9 \\\\ n=3$