-9x+21=-4x-54

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Solution for -9x+21=-4x-54 equation:


Simplifying
-9x + 21 = -4x + -54

Reorder the terms:
21 + -9x = -4x + -54

Reorder the terms:
21 + -9x = -54 + -4x

Solving
21 + -9x = -54 + -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 + -9x + 4x = -54 + -4x + 4x

Combine like terms: -9x + 4x = -5x
21 + -5x = -54 + -4x + 4x

Combine like terms: -4x + 4x = 0
21 + -5x = -54 + 0
21 + -5x = -54

Add '-21' to each side of the equation.
21 + -21 + -5x = -54 + -21

Combine like terms: 21 + -21 = 0
0 + -5x = -54 + -21
-5x = -54 + -21

Combine like terms: -54 + -21 = -75
-5x = -75

Divide each side by '-5'.
x = 15

Simplifying
x = 15

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