Question

1ab+36=ab1

Answer 1

1ab + 36 = ab1 (a khác 0; a,b < 10)

100 + ab + 36 = ab x 10 + 1

136 + ab = ab x 10 + 1

135 + ab = ab x 10

ab x 9 = 135

ab = 15

Vậy ab = 15

Answer 2

Bài 1: 1ab+36=ab1

⇔100+10a+b+36=100a+10b+1

⇔100a+10b−10a−b=136−1

⇔90a+9b=135

⇔9(10a+b)=135

⇒ab=135:9=15

Vậy ab=15