X^2+16+64=81

Solution for X^2+16+64=81 equation:

Simplifying
X2 + 16 + 64 = 81

Reorder the terms:
16 + 64 + X2 = 81

Combine like terms: 16 + 64 = 80
80 + X2 = 81

Solving
80 + X2 = 81

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '-80' to each side of the equation.
80 + -80 + X2 = 81 + -80

Combine like terms: 80 + -80 = 0
0 + X2 = 81 + -80
X2 = 81 + -80

Combine like terms: 81 + -80 = 1
X2 = 1

Simplifying
X2 = 1

Take the square root of each side:
X = {-1, 1}