3x+45=18

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Solution for 3x+45=18 equation: 


Simplifying
3x + 45 = 18

Reorder the terms:
45 + 3x = 18

Solving
45 + 3x = 18

Solving for variable 'x'.

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

Add '-45' to each side of the equation.
45 + -45 + 3x = 18 + -45

Combine like terms: 45 + -45 = 0
0 + 3x = 18 + -45
3x = 18 + -45

Combine like terms: 18 + -45 = -27
3x = -27

Divide each side by '3'.
x = -9

Simplifying
x = -9

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