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2021: [33+ (a+b)×5]=47


Răspuns :

2021: [33+ (a+b)×5]=47

2021=47× [33+ (a+b)×5]

2021:47=33+(a+b)×5

43-33=(a+b)×5

10=(a+b)×5

a+b=10:5

a+b=2

[tex].[/tex]