In 825, a sage of Baghdad, al-Khwarizmi wrote a famous treatise on mathematics called AL-Djabrw J has muqabalah (s assemble and reduce unknowns to match a known quantity.) From there is born ALGEBRA name. The algebra reduces to a specific problem or more simple equations where the numbers to find are replaced by letters that are called "unknown". Where ”Solve " the resolution of equations or inequalities, the calculations of numerical expressions (e.g. 3 x 2 - 7x +3) for values of x belonging to the sets of integer’s problems within algebra. Algebra Preliminary: In a matter of arithmetic the same number can represent two different sizes. One can, for example, consider 12 meters plinth at 12 Euros per meter. In the calculations, the number 12 s ' used alone without indicating the nature of the greatness that is and when you should perform the operations, we cannot know, without making an effort of memory, if the number 12 which is written represents Euros or meters. In addition, if then we do a similar problem, we will be obliged to repeat on new data the same reasoning as we did previously, since we know the nature of the particular quantity represented by each of the numbers written; we cannot enjoy the previous calculations to obtain the result faster. Suppose now that in the previous example, instead of letting the numbers, it is appropriate to be represented by " a” number of meters by" b " the number of Euros that each meter costs
References: http://www.youressayprovider.com/service/research-paper-writing/ http://www.mathportal.org/formulas/algebra/solalgebric.php http://formulas.tutorvista.com/math/algebra-formulas.html https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/v/rearrange-formulas-to-isolate-specific-variables