18+3+2x=306

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Solution for 18+3+2x=306 equation: 


Simplifying
18 + 3 + 2x = 306

Combine like terms: 18 + 3 = 21
21 + 2x = 306

Solving
21 + 2x = 306

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 2x = 306 + -21

Combine like terms: 21 + -21 = 0
0 + 2x = 306 + -21
2x = 306 + -21

Combine like terms: 306 + -21 = 285
2x = 285

Divide each side by '2'.
x = 142.5

Simplifying
x = 142.5

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