x+2x+3=66

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Solution for x+2x+3=66 equation: 


Simplifying
x + 2x + 3 = 66

Reorder the terms:
3 + x + 2x = 66

Combine like terms: x + 2x = 3x
3 + 3x = 66

Solving
3 + 3x = 66

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 3x = 66 + -3

Combine like terms: 3 + -3 = 0
0 + 3x = 66 + -3
3x = 66 + -3

Combine like terms: 66 + -3 = 63
3x = 63

Divide each side by '3'.
x = 21

Simplifying
x = 21

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