Question

The equation 2x+5y=7 has a unique solution if x,y are
A) positive real numbers
B)natural numbers
C) rational numbers
D) real numbers

Answer 1

Dear student.
(a) In natural numbers, there is only one pair i.e., (1, 1) which satisfy the given equation but in positive real numbers, real numbers and rational numbers there are many pairs to satisfy the given linear equation.
Regards