x+18=4x-9

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Solution for x+18=4x-9 equation:


Simplifying
x + 18 = 4x + -9

Reorder the terms:
18 + x = 4x + -9

Reorder the terms:
18 + x = -9 + 4x

Solving
18 + 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.
18 + x + -4x = -9 + 4x + -4x

Combine like terms: x + -4x = -3x
18 + -3x = -9 + 4x + -4x

Combine like terms: 4x + -4x = 0
18 + -3x = -9 + 0
18 + -3x = -9

Add '-18' to each side of the equation.
18 + -18 + -3x = -9 + -18

Combine like terms: 18 + -18 = 0
0 + -3x = -9 + -18
-3x = -9 + -18

Combine like terms: -9 + -18 = -27
-3x = -27

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

Simplifying
x = 9

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