Answer:
-5
Step-by-step explanation:
Let's call this unknown number x.
Then (x+15)-8=2. Therefore, x=2+8-15 = -5.
Answer:
n+15 -8 =2
n=-5
Step-by-step explanation:
Let n be the unknown number
sum of an unknown number and fifteen
n+15
is decreased by eight
n+15 -8
The result is two.
n+15 -8 =2
Combine like terms
n +7 =2
Subtract 7 from each side
n+7-7=2-7
n=-5
