1. 2 + 2.5x = y
2. 4 + 2x = y
Hope this helps.
I think it's
3 1/2
729 1/6
Answer: X is 0.4
Explanation: I typed 5/2 x a bunch of random numbers and decimals on a calculator until I tried 0.4 and when I typed 5/2 x 0.4 on the calculator it said 5/2 x 0.4 = 1.
The answer is really simple just do 3 plus 5 which is 8 so the answer is 8x
