Question

rezolvati ecuatia x+2/5+x+5/6+x+7/7=6
ajutorrrr plllssss

Answer 1

x+2/5+x+5/6+x+7/7=6

3×x +2/5+5/6 +7/7=6

3×x + 42×2+35×5+30×7 tot asta supra/210 =6

3×x + 84+175+210 tot asta supra /210=6

3×x + 259+210 totul supra/210=6

3×x + 469/210=6

3×x= 6/1 - 469/210

3×x=210×6-469 tot asta supra/210

3×x=1260-469 totul supra /210

3×x=791/210

x=791/210 :3/1

x=791/210 ×1/3

x=791×1 totul supra /210×3

x=791 / 630(simplificat cu 7)

x=113/90



A doua metoda


Dam factor comun


x+2/5+x+5/6+x+7/7=6

x+(2/5+5/6+7/7)=6

x+( 42×2+35×5+30×7 tot asta supra/210)=6

Am mai facut acest calcul Si vine =>

x+469/210=6

x=6/1 - 469/210

x=210×6-469 totul supra /210

x=1260-469 totul supra /210

x=791/210 (simplificat cu7)

x=113/90