x-4(x+12)=21

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Solution for x-4(x+12)=21 equation:


Simplifying
x + -4(x + 12) = 21

Reorder the terms:
x + -4(12 + x) = 21
x + (12 * -4 + x * -4) = 21
x + (-48 + -4x) = 21

Reorder the terms:
-48 + x + -4x = 21

Combine like terms: x + -4x = -3x
-48 + -3x = 21

Solving
-48 + -3x = 21

Solving for variable 'x'.

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

Add '48' to each side of the equation.
-48 + 48 + -3x = 21 + 48

Combine like terms: -48 + 48 = 0
0 + -3x = 21 + 48
-3x = 21 + 48

Combine like terms: 21 + 48 = 69
-3x = 69

Divide each side by '-3'.
x = -23

Simplifying
x = -23

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