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Tool: Apples and Oranges 1 Decimal
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Go to: http://play.google.com/store/apps/details (opens a new window)
Description: This application is a basic tool for learning algebra. Users try to solve a system of linear equations with two equations and two unknown variables. It is based on the same problem used in the free app Adding Apples and Oranges, where only integers are used. This new program now works externally with decimals. There is a video that can be used as support material showing Gauss-Jordan, graphic approach, two weighing scales, Cramer's rule, and inverse matrix.
Technology Type: Android 
Guide: User's Guide (opens a new window)
Author: Maurici Carbó
Language: English 
Cost: Requires payment for use

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Courses: Math 7 Linear relationships, Find slope, Slope-intercept form, Equation of the line, Rect coordinate geometry, First quadrant, Geometry in the plane
Algebra Linear Equations, Slope Between Points, Finding Intercepts, Slope - Intercept Form, Point - Slope Form, Graphing, Parallel Lines, Perpendicular Lines, Linear Formulas, Analyzing Linear Data, Is It Linear?, Writing an Equation, Line of Best Fit, Linear Systems, Solve by graphing, Solve by substitution, Solve by combination, Inconsistent System, Applications
Algebra II Solving systems of equations, Cramer's Rule, Matrices, Elimination, Substitution