The word for the punctuation mark, on the other hand, comes from Îºá¿¶Î»Î¿Î½ (or kÅlon), which means âlimbâ or âclauseâ â and it is used because one of the main functions of the colon is to separate two clauses, where the second clause explains or follows from the first.
The goal in solving an equation is to get the variable by itself on one side of the equation and a number on the other side of the equation. To isolate the variable, we must reverse the operations acting on the variable. We do this by performing the inverse of each operation on both sides of the equation.
situations in which you need to find missing information.For instance,Exercise 68 on page 174 shows how to use a linear equation to determine the height of a flagpole by measuring its shadow. Sergio Piumatti Equations and Solutions of Equations An equation in x is a statement that two algebraic expressions are equal. For example, and are equations. To solve an equation in x means to find all values of x for which the equation is true. Such values are solutions. For instance, is a solution of the equation because is a true statement. The solutions of an equation depend on the kinds of numbers being consid-ered. For instance, in the set of rational numbers, has no solution