The expression 4xy + 7 is in
(a) one variable
(b) two variables
(c) no variable
(d) none of these.​

The variables x and y in a linear programming problem are called A) decision variables B) linear variables C) optimal variables D) None of these

System OF linear equation in one variable || two variable|| three variable

Linear equation in two variable

Express the equation 5y =9 as linear equation in two variables

system OF linear equation- for one variable || for two variable || for three variable

what is the linear equation in two Variables ?