2x-9+12x+3x-21=-40

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Solution for 2x-9+12x+3x-21=-40 equation:


Simplifying
2x + -9 + 12x + 3x + -21 = -40

Reorder the terms:
-9 + -21 + 2x + 12x + 3x = -40

Combine like terms: -9 + -21 = -30
-30 + 2x + 12x + 3x = -40

Combine like terms: 2x + 12x = 14x
-30 + 14x + 3x = -40

Combine like terms: 14x + 3x = 17x
-30 + 17x = -40

Solving
-30 + 17x = -40

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 + 17x = -40 + 30

Combine like terms: -30 + 30 = 0
0 + 17x = -40 + 30
17x = -40 + 30

Combine like terms: -40 + 30 = -10
17x = -10

Divide each side by '17'.
x = -0.5882352941

Simplifying
x = -0.5882352941

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