-9-3(4-2x)=12x+42

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Solution for -9-3(4-2x)=12x+42 equation: 


Simplifying
-9 + -3(4 + -2x) = 12x + 42
-9 + (4 * -3 + -2x * -3) = 12x + 42
-9 + (-12 + 6x) = 12x + 42

Combine like terms: -9 + -12 = -21
-21 + 6x = 12x + 42

Reorder the terms:
-21 + 6x = 42 + 12x

Solving
-21 + 6x = 42 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
-21 + 6x + -12x = 42 + 12x + -12x

Combine like terms: 6x + -12x = -6x
-21 + -6x = 42 + 12x + -12x

Combine like terms: 12x + -12x = 0
-21 + -6x = 42 + 0
-21 + -6x = 42

Add '21' to each side of the equation.
-21 + 21 + -6x = 42 + 21

Combine like terms: -21 + 21 = 0
0 + -6x = 42 + 21
-6x = 42 + 21

Combine like terms: 42 + 21 = 63
-6x = 63

Divide each side by '-6'.
x = -10.5

Simplifying
x = -10.5

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