3x^2-21x-18=3x^2-6x-24

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Solution for 3x^2-21x-18=3x^2-6x-24 equation:


Simplifying
3x2 + -21x + -18 = 3x2 + -6x + -24

Reorder the terms:
-18 + -21x + 3x2 = 3x2 + -6x + -24

Reorder the terms:
-18 + -21x + 3x2 = -24 + -6x + 3x2

Add '-3x2' to each side of the equation.
-18 + -21x + 3x2 + -3x2 = -24 + -6x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-18 + -21x + 0 = -24 + -6x + 3x2 + -3x2
-18 + -21x = -24 + -6x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-18 + -21x = -24 + -6x + 0
-18 + -21x = -24 + -6x

Solving
-18 + -21x = -24 + -6x

Solving for variable 'x'.

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

Add '6x' to each side of the equation.
-18 + -21x + 6x = -24 + -6x + 6x

Combine like terms: -21x + 6x = -15x
-18 + -15x = -24 + -6x + 6x

Combine like terms: -6x + 6x = 0
-18 + -15x = -24 + 0
-18 + -15x = -24

Add '18' to each side of the equation.
-18 + 18 + -15x = -24 + 18

Combine like terms: -18 + 18 = 0
0 + -15x = -24 + 18
-15x = -24 + 18

Combine like terms: -24 + 18 = -6
-15x = -6

Divide each side by '-15'.
x = 0.4

Simplifying
x = 0.4

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