12-4x=42-2x

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Solution for 12-4x=42-2x equation:


Simplifying
12 + -4x = 42 + -2x

Solving
12 + -4x = 42 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
12 + -4x + 2x = 42 + -2x + 2x

Combine like terms: -4x + 2x = -2x
12 + -2x = 42 + -2x + 2x

Combine like terms: -2x + 2x = 0
12 + -2x = 42 + 0
12 + -2x = 42

Add '-12' to each side of the equation.
12 + -12 + -2x = 42 + -12

Combine like terms: 12 + -12 = 0
0 + -2x = 42 + -12
-2x = 42 + -12

Combine like terms: 42 + -12 = 30
-2x = 30

Divide each side by '-2'.
x = -15

Simplifying
x = -15

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