A teacher wrote an algebraic expression on the board and asked students to write an equivalent expression. The teacher's expression is partially shown below.

(5a + [_]) + (1/10c + [_]d) - 4

Inez wrote: -4 + (1/10c + 11d). Manny wrote:
4 - (11d + 1/10c). Explain why both students cannot be correct.