3x+72=12x+45

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Solution for 3x+72=12x+45 equation:


Simplifying
3x + 72 = 12x + 45

Reorder the terms:
72 + 3x = 12x + 45

Reorder the terms:
72 + 3x = 45 + 12x

Solving
72 + 3x = 45 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
72 + 3x + -12x = 45 + 12x + -12x

Combine like terms: 3x + -12x = -9x
72 + -9x = 45 + 12x + -12x

Combine like terms: 12x + -12x = 0
72 + -9x = 45 + 0
72 + -9x = 45

Add '-72' to each side of the equation.
72 + -72 + -9x = 45 + -72

Combine like terms: 72 + -72 = 0
0 + -9x = 45 + -72
-9x = 45 + -72

Combine like terms: 45 + -72 = -27
-9x = -27

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

Simplifying
x = 3

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