Question

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

Answer 1

Answer:

(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

Step-by-step 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