Lets first multiply the x by whats in the parenthesis to see what we get and if it makes the problem look easier to solve! We have
Now it looks like if we subtract both sides by 5 we'll get a quadratic in the form of ax2+bx+c=0
so lets do that subtraction and figure out what our a, b, and c are.
so we know that a=4, b=-19, and c=-5
Now lets apply the quadratic formula to see what answers we get. Were looking for
x=(-b ± √(b2 - 4ac)) / 2a
Plugging in the values that we know x ends up being 5 and - 1/4
Note: Be careful when using the quadratic formula. It can be easy to make an algebraic mistake. Try simplifying it a bit before you put the numbers into a calculator to avoid a mistake (If you're allowed one).