Question

what must be added to-26 to get 14?

Answer 1

$x - 26 = 14 \\ x = 14 + 26 \\ x = 40 \\ hope \: it \: helps \: you$

Answer 2

here let the no which should be added be x

now according to question

-26+x=14

x=14+26
x=40
 i hope this help you