Pre-Algebra Examples

$- 3 (x - 4) = - 4 x$

Step 1

Simplify $- 3 (x - 4)$ .

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Step 1.1

Rewrite.

$0 + 0 - 3 (x - 4) = - 4 x$

Step 1.2

Simplify by adding zeros.

$- 3 (x - 4) = - 4 x$

Step 1.3

Apply the distributive property.

$- 3 x - 3 \cdot - 4 = - 4 x$

Step 1.4

Multiply $- 3$ by $- 4$ .

$- 3 x + 12 = - 4 x$

Step 2

Move all terms containing $x$ to the left side of the equation.

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Step 2.1

Add $4 x$ to both sides of the equation.

$- 3 x + 12 + 4 x = 0$

Step 2.2

Add $- 3 x$ and $4 x$ .

$x + 12 = 0$

Step 3

Subtract $12$ from both sides of the equation.

$x = - 12$