【實用教育app】Simultaneous Linear Equations|最夯免費app-綠色工廠好玩App

Simultaneous Equations combines interactive Coaching Calculators and Guides to take you step-by-step through the solving of a pair of simultaneous linear equations.The app features the addition method, the elimination method and the substitution method.Coefficients can be nonzero integers from -99 to 99 inclusive.You develop skills quickly as you work with the calculator and see each step of the process in detail :Addition method :- Choose which variable to eliminate- Decide how to make its coefficients opposites- Manipulate equations to make its coefficients opposites- Eliminate the variable by adding the equations- Solve resulting equation for the other variable- Back substitute into an original equationElimination method :- Choose which variable to eliminate- Decide how to make its coefficients the same (absolute value)- Manipulate equations appropriately- Eliminate the variable by adding/subtracting equations- Solve resulting equation for the other variable- Back substitute into an original equationSubstitution method :The steps if you start by solving first equation to express x in terms of y are shown here.- Solve first equation to express x in terms of y- Substitute x in second equation and solve for y- Substitute y solution back into rearranged first equation - Solve resulting equation for xNote that the Coaching Calculator shows the steps if you start by solving x or y from either equation.