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linear_equation_in_two_variables
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If $a,b,c$ are any fixed numbers, then equation \[ ax+by=c\] is a linear equation in two variables.
When you draw the set of all solutions of a linear equation in two unknowns, you always get a straight line in the $x$-$y$ plane.
linear_equation_in_two_variables.1421854902.txt.gz · Last modified: by rupert