Choosing the letter R arbitrarily makes the problem that much harder to follow (Call it a normal force like everyone else), as does your wildly disproportionate diagram. That's a 45 degree angle and you have it representing as 75 degrees. This makes it much harder to determine which one is supposed to be x or y when they're equal lengths on your diagram.
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What if the wall is not frictionless?
Choosing the letter R arbitrarily makes the problem that much harder to follow (Call it a normal force like everyone else), as does your wildly disproportionate diagram. That's a 45 degree angle and you have it representing as 75 degrees. This makes it much harder to determine which one is supposed to be x or y when they're equal lengths on your diagram.