Final answer:
The student's mathematical expression is simplified using the distributive property and combining like terms to get the final answer of 14 - 4x + 9y.
Step-by-step explanation:
The student's question involves simplifying a mathematical expression using distributive property and combining like terms. The expression to simplify is 6 - 4[x + 1 - (y + 3)] + 5y.
Steps to simplify the expression:
- Apply the distributive property to -4 across the expression in the brackets: -4(x) -4(1) + 4(y + 3).
- Simplify inside the parentheses: -4x - 4 + 4y + 12.
- Combine like terms within the entire expression: 6 - 4x - 4 + 4y + 12 + 5y.
- Add/subtract constant terms and combine like terms: (6 - 4 + 12) + (-4x) + (4y + 5y).
- The simplified result is: 14 - 4x + 9y.