940-2•а=0 ; 620:(с+24)=10

Question

940-2•а=0 ; 620:(с+24)=10

Answer 1

940-2•а=0
2а=940-0
2а=940
а=940:2
а=470

620:(с+24)=10
с+24=620:10
с+24=62
с=62-24
с=38