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hooman
the answer should be 21 hope it helps
Jael323
P.E.M.D.A.S. Parentheses, Exponents, multiplication or division, addition or subtraction. 5 x 4 = 20. 2 + 3 = 5. 5 - 4 + 20. 5 - 4 = 1. 1 + 20 = 21. The answer is 21. 

I hope this helps!