x^2+3x=3x+81

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Solution for x^2+3x=3x+81 equation: 


Simplifying
x2 + 3x = 3x + 81

Reorder the terms:
3x + x2 = 3x + 81

Reorder the terms:
3x + x2 = 81 + 3x

Add '-3x' to each side of the equation.
3x + -3x + x2 = 81 + 3x + -3x

Combine like terms: 3x + -3x = 0
0 + x2 = 81 + 3x + -3x
x2 = 81 + 3x + -3x

Combine like terms: 3x + -3x = 0
x2 = 81 + 0
x2 = 81

Solving
x2 = 81

Solving for variable 'x'.

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

Simplifying
x2 = 81

Take the square root of each side:
x = {-9, 9}

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