4(x-9)=x

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Solution for 4(x-9)=x equation:


Simplifying
4(x + -9) = x

Reorder the terms:
4(-9 + x) = x
(-9 * 4 + x * 4) = x
(-36 + 4x) = x

Solving
-36 + 4x = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-36 + 4x + -1x = x + -1x

Combine like terms: 4x + -1x = 3x
-36 + 3x = x + -1x

Combine like terms: x + -1x = 0
-36 + 3x = 0

Add '36' to each side of the equation.
-36 + 36 + 3x = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 3x = 0 + 36
3x = 0 + 36

Combine like terms: 0 + 36 = 36
3x = 36

Divide each side by '3'.
x = 12

Simplifying
x = 12

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