Question

Simplify 8 - {x - (5 + x)}. 3 13 -2x + 3 -2x + 13

Answer 1

Simplify 8 - {x - (5 + x)}:

Order of operations rules require that you perform work inside parentheses first.  Thus, do this first:   x - (5 + x)         =>  x - 5 - x   =>   -5.  

Now we have the following:           8 - {-5}    =>   8+5   = 13 (answer)

Please note:   To avoid confusion, please separate answer choices, such as 3 13 -2x + 3 -2x + 13, by using commas or by putting each choice on its own new line:

3
13
-2x + 13
I was and still am unsure of what you meant here.