3x+12x=105

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Solution for 3x+12x=105 equation: 


Simplifying
3x + 12x = 105

Combine like terms: 3x + 12x = 15x
15x = 105

Solving
15x = 105

Solving for variable 'x'.

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

Divide each side by '15'.
x = 7

Simplifying
x = 7

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