ab1-1ab=36
100a+10b+1-100-10a-b=36
90a+9b-99=36
9x(10a+b)=36+99
9xab=135
ab=135:9
ab=15
\(\Rightarrow\)a=1;b=5
Vậy a=1;b=5
\(\overline{ab1}-\overline{1ab}\)
\(\Rightarrow100a+10b+1-100-10a-b=36\)
\(\Rightarrow\left(100a-10a\right)+\left(10b-b\right)-99=36\)
\(\Rightarrow90a+9b=135\)
Với \(a\ge2\Rightarrow90a\ge180>135\left(KTM\right)\)
\(a=0\Rightarrow90a=0\Rightarrow9a=135\Rightarrow a=19\left(KTM\right)\)
\(\Rightarrow a=1\Rightarrow90a=90\Rightarrow9b=45\Rightarrow b=5\)
Vậy \(a=1;b=5\)
ab1
-
1ab
36
1 - b = 6.Suy ra b = 5 , b - a = 3,nho 1 vao a , b =5 - 4 = 1. Suy ra a = 1
