Evaluate tan(45) and find the missing sides. (Ik it is a 45-45-90 triangle but I am having trouble especially with evaluating tan(45).)

sorey ik so sorey i need and need to answer a few

1. use commutative property to reorder the terms.2x+81=0.2. move the constant to right side by adding its opposite on both sides. 2x+81-81=0-81.2x=(-81).3. divide the equation on both sides.2x ÷ 2 = 81 ÷ 2.x = -81/2. your answer is -81/2. if you need to simplify it into a decimal, it’s -40.5.