Simplify 9 - {x - (7 + x)}. (a) 16 (b) -2x + 2 (c) -2x + 16 (d) 2x + 2

The correct answer is a) 16

Step-by-step explanation:

To find this first distribute the interior negative to both terms in the parenthesis.

9 - {x - (7 + x)}

9 - {x - 7 - x}

Now simplify the like terms.

9 - {-7}

Now distribute the negative once again.

9 + 7

And complete the indicated operation.

16

it would open into a square depending on the type of envelope i’m not sure about the second part

step-by-step explanation:

the answer is 128