3x=21-15

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Solution for 3x=21-15 equation: 


Simplifying
3x = 21 + -15

Combine like terms: 21 + -15 = 6
3x = 6

Solving
3x = 6

Solving for variable 'x'.

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

Divide each side by '3'.
x = 2

Simplifying
x = 2

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