Question

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Answer 1

(6, 4)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Equality Properties

• Multiplication Property of Equality
• Division Property of Equality
• Addition Property of Equality
• Subtract Property of Equality

Algebra I

• Terms/Coefficients
• Solving systems of equations using substitution/elimination

Explanation:

Step 1: Define Systems

2x - 10y = -28

-10x + 10y = -20

Step 2: Solve for x

Elimination

1. Combine equations: -8x = -48
2. Divide -8 on both sides: x = 6

Step 3: Solve for y

1. Define equation: 2x - 10y = -28
2. Substitute in x: 2(6) - 10y = -28
3. Multiply: 12 - 10y = -28
4. Isolate y term: -10y = -40
5. Isolate y: y = 4