(7x^3-3x^2+7x-2)+(-5x^3+6x^2-3X+9)=

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Solution for (7x^3-3x^2+7x-2)+(-5x^3+6x^2-3X+9)= equation: 


Simplifying
(7x3 + -3x2 + 7x + -2) + (-5x3 + 6x2 + -3X + 9) = 0

Reorder the terms:
(-2 + 7x + -3x2 + 7x3) + (-5x3 + 6x2 + -3X + 9) = 0

Remove parenthesis around (-2 + 7x + -3x2 + 7x3)
-2 + 7x + -3x2 + 7x3 + (-5x3 + 6x2 + -3X + 9) = 0

Reorder the terms:
-2 + 7x + -3x2 + 7x3 + (9 + -3X + 6x2 + -5x3) = 0

Remove parenthesis around (9 + -3X + 6x2 + -5x3)
-2 + 7x + -3x2 + 7x3 + 9 + -3X + 6x2 + -5x3 = 0

Reorder the terms:
-2 + 9 + -3X + 7x + -3x2 + 6x2 + 7x3 + -5x3 = 0

Combine like terms: -2 + 9 = 7
7 + -3X + 7x + -3x2 + 6x2 + 7x3 + -5x3 = 0

Combine like terms: -3x2 + 6x2 = 3x2
7 + -3X + 7x + 3x2 + 7x3 + -5x3 = 0

Combine like terms: 7x3 + -5x3 = 2x3
7 + -3X + 7x + 3x2 + 2x3 = 0

Solving
7 + -3X + 7x + 3x2 + 2x3 = 0

Solving for variable 'X'.

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

Add '-7' to each side of the equation.
7 + -3X + 7x + 3x2 + -7 + 2x3 = 0 + -7

Reorder the terms:
7 + -7 + -3X + 7x + 3x2 + 2x3 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -3X + 7x + 3x2 + 2x3 = 0 + -7
-3X + 7x + 3x2 + 2x3 = 0 + -7

Combine like terms: 0 + -7 = -7
-3X + 7x + 3x2 + 2x3 = -7

Add '-7x' to each side of the equation.
-3X + 7x + 3x2 + -7x + 2x3 = -7 + -7x

Reorder the terms:
-3X + 7x + -7x + 3x2 + 2x3 = -7 + -7x

Combine like terms: 7x + -7x = 0
-3X + 0 + 3x2 + 2x3 = -7 + -7x
-3X + 3x2 + 2x3 = -7 + -7x

Add '-3x2' to each side of the equation.
-3X + 3x2 + -3x2 + 2x3 = -7 + -7x + -3x2

Combine like terms: 3x2 + -3x2 = 0
-3X + 0 + 2x3 = -7 + -7x + -3x2
-3X + 2x3 = -7 + -7x + -3x2

Add '-2x3' to each side of the equation.
-3X + 2x3 + -2x3 = -7 + -7x + -3x2 + -2x3

Combine like terms: 2x3 + -2x3 = 0
-3X + 0 = -7 + -7x + -3x2 + -2x3
-3X = -7 + -7x + -3x2 + -2x3

Divide each side by '-3'.
X = 2.333333333 + 2.333333333x + x2 + 0.6666666667x3

Simplifying
X = 2.333333333 + 2.333333333x + x2 + 0.6666666667x3

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