Answer:
-4
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
Algebra I
- Solving systems of equations using substitution/elimination
Explanation:
Step 1: Define Systems
4x + 5y = -12
-2x + 3y = -16
Step 2: Rewrite Systems
-2x + 3y = -16
- Multiply everything by 2: -4x + 6y = -32
Step 3: Redefine Systems
4x + 5y = -12
-4x + 6y = -32
Step 4: Solve for y
Elimination
- Combine 2 equations: 11y = -44
- Divide 17 on both sides: y = -4