Hello from MrBillDoesMath!
Answer:
y = x/15
Discussion:
Given:
2x/5y = 6 => (multiply both sides by 5y)
(2x/5y) 5y = 6 * (5y) =>
2x = 30y => (divide both sides by 30)
(2/30)x = y =>
y = x/15
( or you could also multiply both sides of the original equation by "y" and then divide both sides by 6)
Thank you,
MrB
It would be B, none of these
Answer: 
is a rational number.
Two numbers = 37
Larger number is x, so the smaller number is 37 - x:
x + (37 - x) = 37
“The difference” is subtraction, so we are subtracting the smaller and larger number.
“Nine more than twice the larger number” looks like 9 + 2x, and “the sum of the smaller number and three” looks like (37 - x) + 3. Because this is subtraction, we would write (9 + 2x) - (37 - x) + 3. First, distribute the negative sign:
-(37 - x) = -37 + x
We then simplify:
9 + 2x - 37 + x + 3 (subtract 3)
9 + 2x - 34 + x
-25 + 2x + x (subtract 8 and 34 then add 2x and x)
-25 + 3x
