Yes, is subtraction, to get their "difference".
first off, let's convert the mixed fractions, to "improper", and then subtract.

The answer is -4,0 4,8 because u would solve for one variable in one of the equations and then substitute the result into the other
What is the context for the question if there is any?
so you are going to use the Pythagorean theorem on the smaller triangle to find the connecting side's length

now you can find the bigger triangle's hypotenuse

c=4
Step-by-step explanation:
6,000,000-300=5,999,700