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rezolvarea ecuatieii (X+1)*10+1=9*(X+2)

Răspuns :

(x+1)*10+1=9(x+2)
10x+10+1=9x+18
10x-9x=18-11
x=7
10x- 10+1 = 9x+18
10x-9x= 18 -11
x = 7