Before my TI graphing calculator died I used to use the 'Solver' function that allowed one to define variables then input knowns and solve for the unknown. Where do I find that
Systems of Equations Solver: Wolfram|Alpha
Wolfram Alpha | Useful Math Tool | Abakcus
Basic Integration in Wolfram Alpha and on the TI 83
Using wolframalpha.com to find the determinant and row reduce a matrix
Derivative Calculator: Wolfram|Alpha
Equation Solver: Wolfram|Alpha
Derivative Calculator: Wolfram|Alpha
Matrix Inverse Calculator: Wolfram|Alpha
Elementary Row Operations in Wolfram|Alpha - Online Technical Discussion Groups—Wolfram Community
The Top 100+ Sines of Wolfram|Alpha—Wolfram|Alpha Blog
Wolfram|Alpha Examples: Step-by-Step Solutions
Double Integral Calculator: Wolfram|Alpha
Posts Categorized as 'Mathematics'—Wolfram|Alpha Blog
Using WolframAlpha, in matrix multiplication, why are "squared" and ^2 giving me different results? - Stack Overflow
Quaternion Properties and Interactive Rotations with Wolfram|Alpha—Wolfram| Alpha Blog
Posts Categorized as 'Mathematics'—Wolfram|Alpha Blog
Step-by-Step Math—Wolfram|Alpha Blog
Determinant Calculator: Wolfram|Alpha
Analyze and Simulate Control Systems in Wolfram|Alpha—Wolfram|Alpha Blog
Limit Calculator: Wolfram|Alpha
linear algebra - Matrix exponential weirdness in WolframAlpha - it fails on diagonal matrices? - Mathematics Stack Exchange