the answer is 
subtract 6x on both sides → 
divide both sides by -2y →
32 is your initial value, because that is what he starts with
c is the answer i know this because im smart and because c is the answer
Answer:
35
Step-by-step explanation:
Here we see 5 black keys for every 7 white keys.
So the ratio is 5:7
If we need 49 white keys, find the amount we scale the original ratio by:
49/7 = 7
So we are scaling by a factor of 7.
The number of black keys would be 5 * the scale of 7. = 35
So there should be 35 black keys.
