Question

biet 1ab + 36=ab1  .vay ba=

Answer 1

=>100+ab+36=ab*10+1

=>(ab*10+1)-(100+ab)36

=>(ab*10-ab)-(100-1)=36

=>ab*9-99=36

=>ab*9=36+99

=>ab*9=135

=>ab=135:9

=>ab=15

=>ab=51

Answer 2

cac ban oi tra loi ba gium minh

thank you