Cindy and Dan together have 20 apples. Cindy has 2 more apples than Dan. How many apples does Dan have?
That's just one of the many basic scenarios where a system of equations would come in handy.
School is part of real life... if you are using equations in school that is real.
Defond your variables. (Saifoo.khan)
Creating an abstract system of equations which describes (and helps reasoning about) a real life system.
architecture jobs
no
Cell phone companies
That is used mainly to solve equations.
Ir is in some people's real life. Example: millions of students that want to pass algebra.
shopping, travel, measurements and money are the real life applications of real number system.
Engineers and mathematicians apply the simplifying of all manner of equations every day in the course of their work. Scientists in several fields may be required to do the same in the course of a particular project or problem.
You will apply them when solving quadratic equations in which the quadratic expression cannot be factorised.
It depends on the equation. The equations we normally deal with in real life usually have one, however, equations can have a potentially infinite number of answers.