His answer should have been 86.
Ethan was asked to do a certain subtraction. Since we don't know the number, we assume the number to be "x".
If he's asked to subtract 15 from x, we have the mathematical equation
x - 15
Going forward, he was asked to divide the resulting answer by 5. The proceeding equation would then be
[tex]\frac{x - 15}{5}[/tex]
Looking at the  second part of the question, we would see that Ethan did
x - 5, then divided by 15
[tex]\frac{x - 5}{15}[/tex] = 30
solving further, we have
x - 5 = 30 * 15
x - 5 = 450
x = 450 - 5
x = 445
with x as 445, we input it into the first equation
[tex]\frac{445 - 15}{5}[/tex] =
[tex]\frac{430}{5}[/tex]= 86
His answer should have been 86.
similar example can be found here https://brainly.com/question/21480650
