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50 + 21 is equal to d. 11+ 60.

What is simplificarion?

Simplification or simplifying fractions means simplifying a complicated mathematical expression to get a single or direct solution.

the value of 50 + 21 = 71 is option C.

a. 20 + 21

b. 60 - 30

c. 20  - 61

d. 11+ 60

Learn more about simplification here:-https://brainly.com/question/723406

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