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Cum calculez 2x+1supra6 = 0,8(3)   Dau 35P

Răspuns :

2x+1/6=83-8/90
⇒2x+1/6=75/90
⇒[2x+1]·90=6·75
⇒[2x+1]·90=450
⇒2x+1=450/90
⇒2x+1=5
⇒2x=5-1
⇒2x=4
⇒x=4/2
⇒x=2;