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HOW TO REMEMBER FORMULA AND CALCULATOR?
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INVenting Brain Assistant Tools
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Demonstration on how to use your smartphone as your formula and calculator tool
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VOICE DATA ENTRY
valid only for smartphone with microphone icon.
Touch clear button. Next touch any white button. Next touch microphone icon 
. Next speak numbers only.
For decimal use the word "point" example say, "thirteen point seventy five" . Then touch the Solve button.
Using Gaussian Elimination
To solve 6 - simultaneous linear equations
+ X + Y + Z
= Equation 1
+ X + Y + Z
= Equation 2
+ X + Y + Z
= Equation 3
+ X + Y + Z
= Equation 4
+ X + Y + Z
= Equation 5
+ X + Y + Z
= Equation 6
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Beta testing for limited time
Using back substitution to find value of U, V, W, X,Y and Z
Answer, U =
Answer, V =
Answer, W =
Answer, X =
Answer, Y =
Answer, Z =
Result of Gaussian elimination
Important definition to remember about row echelon. The process of reducing augmented matrix in row echelon form is called Gaussian elimination
Gaussian elimination will not work if one of the definition is violated.
1. The first nonzero entry in each row is always 1
2. A row with more leading zero entries compare to the previous row must be located below.
3. A row with all zero entries must be below the rows having nonzero entries.
Operation 1 - The order in which any two equations are written may be interchanged.
Operation 2 - Both sides of the equation may be multiplied by the same nonzero real number.
Operation 3 - A multiple of one equation may be added to another equation.