Added 1975-10-13 10:25:21
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Description

Company:
Walter Kissach
URL:
Simultaneous
Version:
1.1
Post Date:
2016-12-03 22:25:21
Price:
$0.99

Download Simultaneous »

Simultaneous Equations is a combined interactive Coaching Calculator and Quick Guide that takes 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 -999 to 999 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 equation

Elimination 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 equation

Substitution 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 x

Note that the Coaching Calculator shows the steps if you start by solving x or y from either equation.

Screenshots

  • Simultaneous Screenshot
  • Simultaneous Screenshot

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