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x supra 2 + 5 supra 6 = 11 supra 4 ------ 2(x-1) = 13

Răspuns :

x/2 + 5/6 = 11/4
6x+10 = 33
6x= 33-10
6x= 23
x= 23/6


2(x-1)= 13
2x-2=13
2x= 13+2
2x= 15
x= 15/2