8x-3=5x+6 7*(3+k)=33+5k Нужно решить и сделать проверку.

уравнять реакции. 1)FeCl+Cl2--->FeCl3 2)Fe(OH)3-->Fe2O3+H2O 3)Ca(OH)2+Na3PO4-->Ca3(PO4)2+NaOH 4)NO2-->NO+O2 5)B2H6+O2--->B2O3+H2O 6_)C5H10+O2--->CO2+H2O 7)FeCl2+Cl2-->FeCl3 8)Al(OH)3-->Al2O3+H2O 9)P2O3+H2O-->H3PO3 10)Mn2O7-->MnO2+O2

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ЗАБОР,ЗАБОРИШКО,ЗАБОРИЩЕ,ЗАБОРЧИК.

судьба или дело случая, что важнее в жизни человека?Докажите на примерах реальной жизни