The initial expression is:
So we can solve for r so:
I think that this is just showing how you can make different percentages by multiplying/dividing by specific numbers.
It is -11x + 24 because you multiply the numbers in the parentheses by 3 then collect like terms 10x +24 - 21x then you do 10x minus 24x and you get -11x+24
You will want to check B, E, and F. Hope this helps!
Answer:
Step-by-step explanation:
