x+12=4x+9

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Solution for x+12=4x+9 equation:


Simplifying
x + 12 = 4x + 9

Reorder the terms:
12 + x = 4x + 9

Reorder the terms:
12 + x = 9 + 4x

Solving
12 + x = 9 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
12 + x + -4x = 9 + 4x + -4x

Combine like terms: x + -4x = -3x
12 + -3x = 9 + 4x + -4x

Combine like terms: 4x + -4x = 0
12 + -3x = 9 + 0
12 + -3x = 9

Add '-12' to each side of the equation.
12 + -12 + -3x = 9 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = 9 + -12
-3x = 9 + -12

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

Divide each side by '-3'.
x = 1

Simplifying
x = 1

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