17 -12 = 8 + x
(x= to the unknown number)
17 - 12 = 8 + x = 5
8 + x = 5
8 - 8 + x = 5 - 8
x = 5 - 8
x = -3
Hope this helps!
Answer:
Step-by-step explanation:
17 - 12 = 8 + x
5 = 8 + x
5 - 8 = x
-3 = x
17 - 12 = 8 + (-3)
