Which of the following is equal to (2x/3 - 7) + 7? . a. (2x - 7) + 21. b. 2x - 21/3. c. 3x/2. d. 2x/3.

(2x/3 - 7) + 7

Remember the order of mathematical operation, PEMDAS.

first, solve the operation inside the parenthesis.
2x/3 - 7 = 2x/3 - 7 * 3/3 = 2x/3 - 21/3 = (2x - 21)/3

In adding or subtracting fractions, make sure that each term have the same denominator.

Then the operation outside the parenthesis,

(2x - 21)/3 + 7 = (2x-21)/3 + 7 * 3/3 = (2x - 21)/3 + 21/3 = 

(2x - 21 + 21) / 3 = 2x/3

The final answer is D. 2x/3