Answer:
When takiing the 2a to the other side she forgot to change sign:
8(−a+4)=−6a−8+8a
−8a+32=2a−8
−10a=−40
a = 4
The answer is C
I think it’s 12 of the hexagon
Javier boss is correct and he should not press it 5 times
It would be 4 2/9. Hope this helps!
Answer:
11 years old
Step-by-step explanation:
If four brothers have the average age 6, then the sum of their ages is

years.
Let x years be the age of sister. If four brothers and their sister have the average age 7, then

Multiply this equation by 5:

The sister is 11 years old.