Question

Which of the following are equations? Which of them are not equations? Why?
(1) 13x - 25 (ii) (12 + 5) + 3 = 20 (ili) x 10 =10 (iv) x + 2x + 1
27
(vi) 2x 314 (vii) 2 + 47 (vii) 9x - 4 = 14​

Answer 1

Answer

An equation is a mathematical statement that two things are equal. It consists of two expressions, one on each side of an 'equals' sign. For example x=y is an equation where two expressions x and y are equal.

Whereas f(x)=x is a function with variable x and hence f(x)=x is not an equation.