Respuesta :

Space

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

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