Let x be the number that we are interested in, then the statement written in algebraic form is:
[tex]x-(-8)=7.[/tex]
Simplifying the above equation we get:
[tex]x+8=7.[/tex]
Subtracting 8 from the above equation we get:
[tex]\begin{gathered} x+8-8=7-8, \\ x=-1. \end{gathered}[/tex]
Therefore, the number we are looking for is -1.
Answer:
[tex]x-(-8)=7.[/tex]
And x=-1.
