Respuesta :

Space

Answer:

r = 90

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

Step-by-step explanation:

Step 1: Define

(r - 74)/4 = 4

Step 2: Solve for r

  1. Multiply 4 on both sides:                    r - 74 = 16
  2. Add 74 on both sides:                        r = 90