Cotangent

Is v = 5 a solution to the equation ?

yes

no

Solution:

Plug v = 5 into the equation and simplify.

Is m=1 a solution of the equation m-3=7?

A number is a solution to an equation if plugging it in results in a true statement. Plug m=1 into the equation and simplify.

, so, m=1 is not a solution to the equation m-3=7.