(2 1 - 6 9)*0,8+6,34=? --- ---- 20 40

Question

(2 1 - 6 9)*0,8+6,34=?
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20 40

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Answer 1

(41/20х249/40)х0,8+6,34=10209/800 х0,8+6,34=10209/800х8/10+6,34=10209/1000+6,34=10,209+6,34=16,549