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Solve stepper systems of 2 linear equations with 2 unknowns by the methods of substitution, equalization and reduction.The coefficients of the system can be integers , fractions and decimals , for example numbers : 3, -5, 2/7, 8.23 , etc .Once entered correctly the system coefficients can see its resolution by the methods of replacement, reduction and equalization . This step by step as if it were made into a book .In the event that the application is incompatible system implies without any problem.If it's an unknown support system has infinite solutions expressed in terms of a parameter is taken and sets x = t versus t . If it is not possible does the opposite , ie take x = t and put t function .- In the case of the substitution method first tries to clear the unknown x in the first equation to substitute into the second equation . If this is not possible because the amount of the x coefficient is 0 then try and clear the .** If you hold the button a menu where you can choose the unknown soy clear first and what equation is shown . ( FULL VERSION )- In the case of the method of matching the unknown x of the two equations is cleared then the resulting expressions equal and solve for y. If you can not isolate x in both equations tries to clear the yy if not possible then it indicates that the system can not be solved by this method.** If we keep the button pressed a menu where you can decide whether xo is displayed and cleared . ( FULL VERSION )- For the first reduction method which attempts to eliminate the variable ' and' multiplying the first equation by the coefficient of ' and' in the second and multiply the second equation by the coefficient of the opposite ' and' the first . Thus by adding the resulting equations will eliminate the 'y'. If any of these factors be used 0 , you try to delete the analogy 'x'.Holding the button ** a menu where you first decide whether I want to eliminate x appears. ( FULL VERSION )If a certain system can not be solved by a particular method implies.Solve all cases of indeterminate compatible systems.