2x+81-2*9*x+x^2=144-2*12*x+x^2-2x-4

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Solution for 2x+81-2*9*x+x^2=144-2*12*x+x^2-2x-4 equation: 


Simplifying
2x + 81 + -2 * 9x + x2 = 144 + -2 * 12x + x2 + -2x + -4

Multiply -2 * 9
2x + 81 + -18x + x2 = 144 + -2 * 12x + x2 + -2x + -4

Reorder the terms:
81 + 2x + -18x + x2 = 144 + -2 * 12x + x2 + -2x + -4

Combine like terms: 2x + -18x = -16x
81 + -16x + x2 = 144 + -2 * 12x + x2 + -2x + -4

Multiply -2 * 12
81 + -16x + x2 = 144 + -24x + x2 + -2x + -4

Reorder the terms:
81 + -16x + x2 = 144 + -4 + -24x + -2x + x2

Combine like terms: 144 + -4 = 140
81 + -16x + x2 = 140 + -24x + -2x + x2

Combine like terms: -24x + -2x = -26x
81 + -16x + x2 = 140 + -26x + x2

Add '-1x2' to each side of the equation.
81 + -16x + x2 + -1x2 = 140 + -26x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
81 + -16x + 0 = 140 + -26x + x2 + -1x2
81 + -16x = 140 + -26x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
81 + -16x = 140 + -26x + 0
81 + -16x = 140 + -26x

Solving
81 + -16x = 140 + -26x

Solving for variable 'x'.

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

Add '26x' to each side of the equation.
81 + -16x + 26x = 140 + -26x + 26x

Combine like terms: -16x + 26x = 10x
81 + 10x = 140 + -26x + 26x

Combine like terms: -26x + 26x = 0
81 + 10x = 140 + 0
81 + 10x = 140

Add '-81' to each side of the equation.
81 + -81 + 10x = 140 + -81

Combine like terms: 81 + -81 = 0
0 + 10x = 140 + -81
10x = 140 + -81

Combine like terms: 140 + -81 = 59
10x = 59

Divide each side by '10'.
x = 5.9

Simplifying
x = 5.9

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