Firstly, you've got to expand the brackets, this becomes;
8a-4= -10a+ 50
You've then got to eliminate the -10a and you do this by adding 10a to both sides,
This then becomes 18a-4=50
You've then got to add 4, to eliminate this, which then becomes 18a=54
You've then got to divide both sides by 18, and this becomes 3.
Therefor, a=3
Hope this helps :)
Answer:
10!
Step-by-step explanation: because 10,20,30,40 they each go by 10
10+6=16
7+9=16
Therefore, the mystery number is 9.
Answer:
That is easy.
-41275.
Step-by-step explanation:
Can I have brainliest please
