18x=15x+21

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Solution for 18x=15x+21 equation: 


Simplifying
18x = 15x + 21

Reorder the terms:
18x = 21 + 15x

Solving
18x = 21 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
18x + -15x = 21 + 15x + -15x

Combine like terms: 18x + -15x = 3x
3x = 21 + 15x + -15x

Combine like terms: 15x + -15x = 0
3x = 21 + 0
3x = 21

Divide each side by '3'.
x = 7

Simplifying
x = 7

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