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25. 7a-3b supra 4a +2b stiind ca a supra b= 6 supra 3 URGENT!


Răspuns :

a/b= 6/3=2 , deci a =2b
7a-3b/4a+2b= 7*2b -3b/4*2b+2b=11b/10b = 11/10