Your answer to number 17 is x=4 because you replace y with 0 and you get 4x-3(0)=16. Then you multiply 3 by 0 to get 0 and get 4x=16 as ur equation. Then you can divide both sides by 4 to get 4 as your x.
Your answer to number 19 is 0 because 3(2x)-6x=0 is also known as 6x-6x=0 which equals 0.
Think of it like your drawing it in your head in my head i would say 8+4=12 carry the 1 so 7+3+1= 11 carry the 1 then 8+5+ 1= 14 so the answer would be 1,412
You could make this really simple by dividing 300 by 4 to see how much 1/4 of that is and then subtracting 1/4 from 300 to see how much dashawn's water bottle holds.
