A word equation is where you with the words of the reactants and
products instead of the symbols. H2 + 1/2 O2 --> H2O Symbol
equation Hydrogen + Oxygen --> Water Word equation :-)

Word equations as chemical equations would mean like word equation: hydrogen + bromine ---> hydrogen bromide chemical equation: H + Br ---> HBr Balance Hydrogen and Bromine would be HBr because hydrogen (H) has a positive charge of 1 and bromine (Br) has a negative charge of 1 so they are balanced.

It may be possible to solve equations. Expressions cannot be solved until they are converted, with additional information, into equations or inequalities which may have solutions.

Complex equations? Do you mean complicated equations whose solution is 17, - or equations with complex (non-real) coefficients or solutions? If you can explain, please resubmit your question.

A word equation is one way of representing a chemical reaction. Word equations are a more efficient way to describe chemical changes and to predict the products of a chemical reaction.

an inequality is a equation simalr to a normal one but the to equations are not = they use they signs < > = sin with a line trough it and < > signs with underlines

System Internationale. This is the system used by internationally by scientists to avoid unit conversions and eliminate the need for extra constants in equations.

It means that the coordinates of the point of intersection satisfy the equations of both lines. In the case of simultaneous [linear] equations, these coordinates are the solution to the equations.

A system of equations is two or more equations that share at least one variable. Once you have determined your equations, solve for one of the variables and substitute in that solution to the other equation.