Systems of linear equations: An equation of a line
A linear equation with two unknowns
Linear equation with two unknowns
A solution of a linear equation with two unknowns #\blue x#, #\green y# is a point#\rv{\blue x,\green y}#, for which the equation is true. An equation is true when you substitute the value of #\blue x# and #\green y# of that point in the equation, and the left and right hand side of the equation are equal. |
Example \[3\cdot \blue{x}+5 \cdot \green{y}+5=0 \] The point #\rv{\blue 0,-\green{1}}# is a solution: \[3\cdot \blue{0}+5 \cdot \green{-1}+5=0\] |
Yes
After all, to determine if the point #\rv{3, -{{19}\over{2}}}# is a solution to the equation, we enter the point in the equation. If the equation is true, then the point is a solution. If the equation is not true, then the point is not a solution to the equation. In this case we have:
\[9\cdot 3+2\cdot -{{19}\over{2}}-8=0\]
The equation is true, hence # \rv{3, -{{19}\over{2}}}# is a solution to the equation.
After all, to determine if the point #\rv{3, -{{19}\over{2}}}# is a solution to the equation, we enter the point in the equation. If the equation is true, then the point is a solution. If the equation is not true, then the point is not a solution to the equation. In this case we have:
\[9\cdot 3+2\cdot -{{19}\over{2}}-8=0\]
The equation is true, hence # \rv{3, -{{19}\over{2}}}# is a solution to the equation.
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