Bài 1 :
\(a,124\times x=4829-365\)
\(124\times x=4464\)
\(x=4464:124\)
\(x=36\)
\(b,96\times x-26\times x=70\)
\(\left(96-26\right)\times x=70\)
\(70\times x=70\)
\(x=70:70\)
\(x=1\)
Bài 2:
Chia hết cho 2:
\(\overline{a}=0;1;2;3;4;...\)
\(\overline{b}=0;2;4;6;8.\)
Chia hết cho 5:
\(\overline{a}=0;1;2;3;4;5;...\)
\(\overline{b}=0;5.\)
Chia hết cho 9 :
\(\overline{40590;\overline{40599};\overline{41598};...}\)