Question

16.-Write an algebraic model for the statement. the difference of a number and -8 is 7

Answer 1

Let x be the number that we are interested in, then the statement written in algebraic form is:

$x-(-8)=7.$

Simplifying the above equation we get:

$x+8=7.$

Subtracting 8 from the above equation we get:

$\begin{gathered} x+8-8=7-8, \\ x=-1. \end{gathered}$

Therefore, the number we are looking for is -1.

Answer:

$x-(-8)=7.$

And x=-1.