Questions: Solve for D: 27 D - 9 - 12 D = 21, Enter only the value without D and equal

Solve for D: 27 D - 9 - 12 D = 21, Enter only the value without D and equal

Solution

To solve for \( D \) in the equation \( 27D - 9 - 12D = 21 \), we need to:

Step 1: Combine Like Terms

Starting with the equation: \[ 27D - 9 - 12D = 21 \] we combine the \( D \) terms: \[ (27D - 12D) - 9 = 21 \] which simplifies to: \[ 15D - 9 = 21 \]

Step 2: Isolate \( D \)

Next, we isolate \( D \) by adding 9 to both sides: \[ 15D = 21 + 9 \] This simplifies to: \[ 15D = 30 \]

Step 3: Solve for \( D \)

Now, we divide both sides by 15: \[ D = \frac{30}{15} \] which simplifies to: \[ D = 2 \]

The value of \( D \) is \(\boxed{2}\).

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