12u−3=3(4u−1)

Sure, let's solve the equation step by step:

1. First, distribute the 3 on the right side of the equation: 3 * 4u - 3 * 1 = 12u - 3
2. This simplifies to: 12u - 3 = 12u - 3
3. Subtract 12u from both sides: -3 = -3
4. Add 3 to both sides: 0 = 0

This equation is an identity, meaning it is true for all values of u.