1ab + 36 = ab1
=> 100 + ab + 36 = ab x 10 + 1
=> 136 + ab = ab x 10 + 1
=> 136 - 1 = ab x (10 - 1)
=> 135 = ab x 9
=> ab = 135 : 9
=> ab = 15
Vậy ab = 15
Ủng hộ mk nha !!! ^_^
1ab+36=ab1
=>100+10.a+b+36=100a+10b+1
=>136+10a+b=100a+10b+1
=>135=90a+9b
=>135=9(10a+b)
=>135:9=ab
=>ab=15
=> 100+ab+36=ab0+1
=> ab+136-1= ab0
=> ab+135=ab0
=> 135= ab.10-ab
=> 135= ab.9
=> ab=135:9
=> ab=15
Ta có :
1ab + 36 = ab1
100 + ab + 36 = ab x 10 + 1
136 = ab x 9 + 1
ab x 9 = 136 - 1
ab x 9 = 135
ab = 135 : 9
ab = 15