9x+6=4x+21

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


Simplifying
9x + 6 = 4x + 21

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

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

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

Combine like terms: 9x + -4x = 5x
6 + 5x = 21 + 4x + -4x

Combine like terms: 4x + -4x = 0
6 + 5x = 21 + 0
6 + 5x = 21

Add '-6' to each side of the equation.
6 + -6 + 5x = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 5x = 21 + -6
5x = 21 + -6

Combine like terms: 21 + -6 = 15
5x = 15

Divide each side by '5'.
x = 3

Simplifying
x = 3

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