3x+18=81

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Solution for 3x+18=81 equation: 


Simplifying
3x + 18 = 81

Reorder the terms:
18 + 3x = 81

Solving
18 + 3x = 81

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + 3x = 81 + -18

Combine like terms: 18 + -18 = 0
0 + 3x = 81 + -18
3x = 81 + -18

Combine like terms: 81 + -18 = 63
3x = 63

Divide each side by '3'.
x = 21

Simplifying
x = 21

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