Hi can someone help me with the first one? I need a clear explanation on what to put in the number lines, and what 20 percent is converted into!

so if dads truck holds 16 gallons and we are finding 25% more that, we need to find what 25% of 16 is. 25% is a total of 1/4 and 1/4 of 16 is 4. now we add 4 to 16 to get 20.  

20% is converted into 1/5   so 1/5 of 35 is 7. now we add 7 to 35 to get 42

let me know if wrong and if right plz give brainliest

Step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9