It’s false because if you take a negative number away from another negative number it would give you another negative number not a positive number!
That's an expression, so the only thing you can do is simplify it, but that already looks simplified.
2/5. The answer is 2/5 since 4/10 in simplest form is 2/5
The answer is 3 N=4 and P=3 N+P=7. No other two combinations will give you a rational number
