Answer:
Step-by-step explanation:
We can solve this with some pretty simple substitution
First write that a=2b+8
and our reasoning for this is that we added 2b from the first equation
Then write
4(2b+8)+3b=21
After we figured out what A was in the previous part we are able to substitute that into our other equation
Then you solve for b from here
8b+32+3b=21
11b=-11
b= -1
If you have any questions leave them below
