Answer:
49?
Step-by-step explanation:
15 is the answer because 5 is a prime factor so 5 into 105=21 and 3 is another prime factor so 3 into 21=7 and 7 is another so 7 into 7=1 and 5+3+7=15
Answer:

Step-by-step explanation:
Given

Required
Solve
Open brackets


Collect like terms


12x +13 equal to or not equal to 12x - 6 + 8 or 12x +2
No, these expressions are not equivalent.
Hope this helps!