Can anyone help! Struggling on this question!!

Answer:
[tex]\frac{1}{10}[/tex]
Step-by-step explanation:
note that in terms of the given fraction
1 = [tex]\frac{10}{10}[/tex] , then
[tex]\frac{9}{10}[/tex] + [tex]\frac{1}{10}[/tex] = [tex]\frac{10}{10}[/tex] = 1
Answer:
[tex] \frac{9}{10} + x = 1 \\ x = 1 - \frac{9}{10} \\ x = \frac{(10 - 9)}{10} \\ \boxed{x = \frac{1}{10} } \: is \: the \: required \: number[/tex]