State whether the following statements are true (T) or false (F):
If y is a variable then y-5 is also variable.
As the value of y is not fix hence it is a variable. Similarly the value of y-5 is not fix as it depends on the value of y. So, y-5 is also a variable
(iii) The number of angles in a triangle is a variable.
(i) If x is a variable then 5x is also variable.
(vi) An equation is satisfied only for a definite value of the variable.