Question

X-5y= -40
18x - 5y = 45
What is the answer to this

Answer 1

(5, 9)

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

• Solving systems of equations using substitution/elimination

Explanation:

Step 1: Define Systems

x - 5y = -40

18x - 5y = 45

Step 2: Rewrite Systems

18x - 5y = 45

1. Multiply both sides by -1: -18x + 5y = -45

Step 3: Redefine Systems

x - 5y = -40

-18x + 5y = -45

Step 4: Solve for x

Elimination

1. Combine equations: -17x = -85
2. Divide -17 on both sides: x = 5

Step 5: Solve for y

1. Define equation: x - 5y = -40
2. Substitute in x: 5 - 5y = -40
3. Isolate y term: -5y = -45
4. Isolate y: y = 9