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ajutatima va roggggg frumos dau coroana a rog frumos ! nimeni nu o sa ma ajute : sunt doua puncte nu impartire

Ajutatima Va Roggggg Frumos Dau Coroana A Rog Frumos Nimeni Nu O Sa Ma Ajute Sunt Doua Puncte Nu Impartire class=

Răspuns :

5.a) x=2*3/10=3/5; d)3x/10:2/9=54=>3x/10*9/2=54=>27x/20=54=>x=(54*20)/27=>x=40.b) 37/36:x=37/18=>x=37/36:37/18=>x=37/36*18/37=>x=1/2. e)2x+2/9=16/15, eliminam numitorul(nc=45)=>90x+10=48=>90x=38=>x=38/90=>x=19/45. g) 3x/4+1/3=13/12=>9x+4=13=>9x=9=>x=1; h) 5x/4+5/6=17/2=>15x+10=102=>15x=92=>x=92/15.. 6)2,21x=6,63=>x=3; b)2,27x=11,35=>x=5; d) 14x/10-12/10=33/90=>nc=90 126x-108=33=>126x=141=>x=141/126=47/42. e) 7x/18:7/6=3/9=> 7x/18*6/7=1/3=>simplificam si ramane x/3=1/3=>x=1