x+9=4x+42

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Solution for x+9=4x+42 equation:


Simplifying
x + 9 = 4x + 42

Reorder the terms:
9 + x = 4x + 42

Reorder the terms:
9 + x = 42 + 4x

Solving
9 + x = 42 + 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.
9 + x + -4x = 42 + 4x + -4x

Combine like terms: x + -4x = -3x
9 + -3x = 42 + 4x + -4x

Combine like terms: 4x + -4x = 0
9 + -3x = 42 + 0
9 + -3x = 42

Add '-9' to each side of the equation.
9 + -9 + -3x = 42 + -9

Combine like terms: 9 + -9 = 0
0 + -3x = 42 + -9
-3x = 42 + -9

Combine like terms: 42 + -9 = 33
-3x = 33

Divide each side by '-3'.
x = -11

Simplifying
x = -11

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