How does 4x/4=32/4 help solve 4x-12=20

Multiplying both sides by 4 undoes the division
Multiplying both sides by 4 isolates the variable
Dividing both sides by 4 eliminates the variable
Diving both sides by 4 isolated the variable

1 answer

To solve the equation \( 4x - 12 = 20 \), you can follow the steps outlined, but the specific statement you referenced, \( \frac{4x}{4} = \frac{32}{4} \), appears to be a misinterpretation in the context of solving the equation.

Here is a clearer breakdown of how to solve \( 4x - 12 = 20 \) step by step:

  1. Add 12 to both sides to isolate the term with \( x \): \[ 4x - 12 + 12 = 20 + 12 \] which simplifies to: \[ 4x = 32 \]

  2. Divide both sides by 4 to solve for \( x \): \[ \frac{4x}{4} = \frac{32}{4} \] which simplifies to: \[ x = 8 \]

So, the correct answer among the choices you provided would be:

  • Dividing both sides by 4 isolates the variable.

Thus, \( \frac{4x}{4} = \frac{32}{4} \) effectively isolates the variable \( x \).