Question

find three consecutive numbers such that the sum if first and the last number exceeds the second by 10

Answer 1

let the number are x,x+1, x+2
$x + x + 2 = x + 1 + 10 \\ 2x + 2 = x + 11 \\ 2x - x = 11 - 2 \\ x = 9 \\ next \: is \: x + 1 = 9 + 1 = 10 \\ third \: no \: is \: 11$