(3x^2+5x-4)+(4x^2+6x+13)-(7x^2-18)=

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Solution for (3x^2+5x-4)+(4x^2+6x+13)-(7x^2-18)= equation:


Simplifying
(3x2 + 5x + -4) + (4x2 + 6x + 13) + -1(7x2 + -18) = 0

Reorder the terms:
(-4 + 5x + 3x2) + (4x2 + 6x + 13) + -1(7x2 + -18) = 0

Remove parenthesis around (-4 + 5x + 3x2)
-4 + 5x + 3x2 + (4x2 + 6x + 13) + -1(7x2 + -18) = 0

Reorder the terms:
-4 + 5x + 3x2 + (13 + 6x + 4x2) + -1(7x2 + -18) = 0

Remove parenthesis around (13 + 6x + 4x2)
-4 + 5x + 3x2 + 13 + 6x + 4x2 + -1(7x2 + -18) = 0

Reorder the terms:
-4 + 5x + 3x2 + 13 + 6x + 4x2 + -1(-18 + 7x2) = 0
-4 + 5x + 3x2 + 13 + 6x + 4x2 + (-18 * -1 + 7x2 * -1) = 0
-4 + 5x + 3x2 + 13 + 6x + 4x2 + (18 + -7x2) = 0

Reorder the terms:
-4 + 13 + 18 + 5x + 6x + 3x2 + 4x2 + -7x2 = 0

Combine like terms: -4 + 13 = 9
9 + 18 + 5x + 6x + 3x2 + 4x2 + -7x2 = 0

Combine like terms: 9 + 18 = 27
27 + 5x + 6x + 3x2 + 4x2 + -7x2 = 0

Combine like terms: 5x + 6x = 11x
27 + 11x + 3x2 + 4x2 + -7x2 = 0

Combine like terms: 3x2 + 4x2 = 7x2
27 + 11x + 7x2 + -7x2 = 0

Combine like terms: 7x2 + -7x2 = 0
27 + 11x + 0 = 0
27 + 11x = 0

Solving
27 + 11x = 0

Solving for variable 'x'.

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

Add '-27' to each side of the equation.
27 + -27 + 11x = 0 + -27

Combine like terms: 27 + -27 = 0
0 + 11x = 0 + -27
11x = 0 + -27

Combine like terms: 0 + -27 = -27
11x = -27

Divide each side by '11'.
x = -2.454545455

Simplifying
x = -2.454545455

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