Solved by pluggable solver: DESCRIBE a linear EQUATION: slope, intercepts, etc |
Equation AMP Parsing Error of [-6 x + -1 y = ]: Invalid expression '': syntax error at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 203.
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describes a sloping line. For any equation ax+by+c = 0, slope is
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