设原两位数个位是 x ,则十位是 13 - x
10(13 - x) + x + 27 = 10x + 13 - x
130 - 10x + x + 27 = 10x + 13 - x
-9x + 157 = 9x + 13
9x + 9x = 157 - 13
18x = 144
x = 14418
x = 8
个位 = x = 8
十位 = 13 - x = 5
所以原两位数是 58
设原两位数个位是 x ,则十位是 13 - x
10(13 - x) + x + 27 = 10x + 13 - x
130 - 10x + x + 27 = 10x + 13 - x
-9x + 157 = 9x + 13
9x + 9x = 157 - 13
18x = 144
x = 14418
x = 8
个位 = x = 8
十位 = 13 - x = 5
所以原两位数是 58