(4x^2+9x)+(3x^2+5x+18)-(7x^2-12)=

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Solution for (4x^2+9x)+(3x^2+5x+18)-(7x^2-12)= equation:


Simplifying
(4x2 + 9x) + (3x2 + 5x + 18) + -1(7x2 + -12) = 0

Reorder the terms:
(9x + 4x2) + (3x2 + 5x + 18) + -1(7x2 + -12) = 0

Remove parenthesis around (9x + 4x2)
9x + 4x2 + (3x2 + 5x + 18) + -1(7x2 + -12) = 0

Reorder the terms:
9x + 4x2 + (18 + 5x + 3x2) + -1(7x2 + -12) = 0

Remove parenthesis around (18 + 5x + 3x2)
9x + 4x2 + 18 + 5x + 3x2 + -1(7x2 + -12) = 0

Reorder the terms:
9x + 4x2 + 18 + 5x + 3x2 + -1(-12 + 7x2) = 0
9x + 4x2 + 18 + 5x + 3x2 + (-12 * -1 + 7x2 * -1) = 0
9x + 4x2 + 18 + 5x + 3x2 + (12 + -7x2) = 0

Reorder the terms:
18 + 12 + 9x + 5x + 4x2 + 3x2 + -7x2 = 0

Combine like terms: 18 + 12 = 30
30 + 9x + 5x + 4x2 + 3x2 + -7x2 = 0

Combine like terms: 9x + 5x = 14x
30 + 14x + 4x2 + 3x2 + -7x2 = 0

Combine like terms: 4x2 + 3x2 = 7x2
30 + 14x + 7x2 + -7x2 = 0

Combine like terms: 7x2 + -7x2 = 0
30 + 14x + 0 = 0
30 + 14x = 0

Solving
30 + 14x = 0

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + 14x = 0 + -30

Combine like terms: 30 + -30 = 0
0 + 14x = 0 + -30
14x = 0 + -30

Combine like terms: 0 + -30 = -30
14x = -30

Divide each side by '14'.
x = -2.142857143

Simplifying
x = -2.142857143

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