6x+21=-4x-9

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Solution for 6x+21=-4x-9 equation:


Simplifying
6x + 21 = -4x + -9

Reorder the terms:
21 + 6x = -4x + -9

Reorder the terms:
21 + 6x = -9 + -4x

Solving
21 + 6x = -9 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
21 + 6x + 4x = -9 + -4x + 4x

Combine like terms: 6x + 4x = 10x
21 + 10x = -9 + -4x + 4x

Combine like terms: -4x + 4x = 0
21 + 10x = -9 + 0
21 + 10x = -9

Add '-21' to each side of the equation.
21 + -21 + 10x = -9 + -21

Combine like terms: 21 + -21 = 0
0 + 10x = -9 + -21
10x = -9 + -21

Combine like terms: -9 + -21 = -30
10x = -30

Divide each side by '10'.
x = -3

Simplifying
x = -3

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