Respuesta :

r is equal to all numbers from -infinity to infinity.

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Answer:

All real numbers.

Step-by-step explanation:

Any value of r makes the equation true.

Interval Notation:

(- ∞, ∞)

Step 1: Simplify both sides of the equation.

5r + 3 = 5r + 3

Step 2: Subtract 5r from both sides.

5r + 3 - 5r = 5r + 3 - 5r

3 = 3

Step 3: Subtract 3 from both sides.

3 - 3 = 3 - 3

0 = 0

Therefor, your answer would be "All real numbers"

Hope this helps!