-4•(-а + 3с)-5а

To simplify the expression \(-4(-a + 3c) - 5a\), follow these steps: 1. Distribute the \(-4\) across the terms inside the parentheses: \[ -4 \cdot -a + -4 \cdot 3c = 4a - 12c \] 2. Now substitute this back into the expression: \[ 4a - 12c - 5a \] 3. Combine like terms: \[ (4a - 5a) - 12c = -1a - 12c = -a - 12c \] So, the simplified expression is: \[ -a - 12c \]