To solve this equation, we need to combine like terms on both sides:

Given equation: 5c - 4a = 3c - a

First, we want to get the variable terms (c and a) on one side of the equation and the constants on the other side.

To do that, we can add 3 to both sides:

5c - 4a + 3 = 3c - a + 3
5c - 4a + 3 = 3c - a + 3

Next, we can further simplify by combining like terms:

5c - 4a + 3 = 3c - a + 3
5c - 4a + 3 = 3c - a + 3

Subtract 3c from both sides:

5c - 4a + 3 - 3 = 3c - a + 3 - 3
5c - 4a + 3 - 3 = 3c - a + 3 - 3

This simplifies to:

5c - 4a = 3c - a

Therefore, the equation remains the same: 5c - 4a = 3c - a.