Please get this done asap

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Im literally having a mental breakdown