12x+3x=45

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Solution for 12x+3x=45 equation: 


Simplifying
12x + 3x = 45

Combine like terms: 12x + 3x = 15x
15x = 45

Solving
15x = 45

Solving for variable 'x'.

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

Divide each side by '15'.
x = 3

Simplifying
x = 3

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