What value of s makes the statement true?

(–7 + s) + (–14) = (12 + (–7)) + (–14)

A.
–30

B.
–12

C.
–7

D.
12

Question

What value of s makes the statement true?  
 
(–7 + s) + (–14) = (12 + (–7)) + (–14)
 
 A.
–30
 
 B.
–12
 
 C.
–7
 
 D.
12

ccswims · Answer

well think of it this way, they are doing the communicative property of addition

ccswims · Answer

that means such as 12+3+4 = 4+12+3

ccswims · Answer

so if 12 + (-7) + (-14) what would (-7 + s) + (-14) be?

ccswims · Answer

what is missing from equation two that equation one has?

igreen · Answer

(–7 + s) + (–14) = (12 + (–7)) + (–14)

Well we can simplify it first.

-7 + s - 14 = 12 - 7 - 14

Simplify all whole numbers:

s - 21 = -9

If we put in 12 we get:

12 - 21 = -9

-9 = -9

So 12 is your answer.

ccswims · Answer

there is a much simpler way

ccswims · Answer

you could've just seen 12 was the only other thing missing

ccswims · Answer

but which ever way you do it both are correct :)