It can. And does, for example, in the hyperbolic trigonometric functions. It can make the solution harder but there is no law that says that solutions must be easy!
Only if it has an equality sign otherwise it is an expression.
It is called a variable fraction.
It is a variable fraction. The exact nature will depend on the form in which the variable appears:as part of an algebraic, trigonometric, etc function. In some cases the fraction will have a name, in others it will not.
-- If the equation has only one variable (like 'x' or 'y'), and the only power of the variable anywhere in the equation is '1', then the equation has one solution. -- If the variable appears raised to powers higher than '1', then there are as many solutions as the highest power of the variable. -- If the equation has two or more variables, then there are an infinite number of solutions.
Simultaneous equation* * * * *No, simultaneous equations are two or more equations that have all to be true at the same time (simultaneously) for the solution.An equation with more than one variable is a multivariate equaion.Area = 0.5*Length*Height or a = 0.5*l*h for the area of a triangle has more than one variables, but it is certainly not simultaneous.An equation with a variable is called a single variable equation. An equation that has more than one variable is called as a multi-variable equation. A polynomial equation has one variable in different powers: a common example is quadratic equations.
An equation with more than one variable is called a multivariate equation.
Simultaneous equation* * * * *No, simultaneous equations are two or more equations that have all to be true at the same time (simultaneously) for the solution.An equation with more than one variable is a multivariate equaion.Area = 0.5*Length*Height or a = 0.5*l*h for the area of a triangle has more than one variables, but it is certainly not simultaneous.An equation with a variable is called a single variable equation. An equation that has more than one variable is called as a multi-variable equation. A polynomial equation has one variable in different powers: a common example is quadratic equations.
A bivariate equation.
Multivariable equation
It is a variable fraction. The exact nature will depend on the form in which the variable appears:as part of an algebraic, trigonometric, etc function. In some cases the fraction will have a name, in others it will not.
Multivariable equation
You are given a system of n or more simultaneous linear equations involving n unknowns. Pick one of the unknowns, called the pivot variable. Find an equation in which it appears, called the pivot equation.