4x-9x+21=4x+39

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Solution for 4x-9x+21=4x+39 equation:


Simplifying
4x + -9x + 21 = 4x + 39

Reorder the terms:
21 + 4x + -9x = 4x + 39

Combine like terms: 4x + -9x = -5x
21 + -5x = 4x + 39

Reorder the terms:
21 + -5x = 39 + 4x

Solving
21 + -5x = 39 + 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 + -5x + -4x = 39 + 4x + -4x

Combine like terms: -5x + -4x = -9x
21 + -9x = 39 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + -9x = 39 + 0
21 + -9x = 39

Add '-21' to each side of the equation.
21 + -21 + -9x = 39 + -21

Combine like terms: 21 + -21 = 0
0 + -9x = 39 + -21
-9x = 39 + -21

Combine like terms: 39 + -21 = 18
-9x = 18

Divide each side by '-9'.
x = -2

Simplifying
x = -2

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