4x+9=6x+21

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


Simplifying
4x + 9 = 6x + 21

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

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

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

Combine like terms: 4x + -6x = -2x
9 + -2x = 21 + 6x + -6x

Combine like terms: 6x + -6x = 0
9 + -2x = 21 + 0
9 + -2x = 21

Add '-9' to each side of the equation.
9 + -9 + -2x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -2x = 21 + -9
-2x = 21 + -9

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

Divide each side by '-2'.
x = -6

Simplifying
x = -6

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