\left\{ \begin{array} { l } { k + b = 0 } \\ { b = - 3 } \end{array} \right.
Solve for k, b
k=3
b=-3
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\left\{ \begin{array} { l } { k + b = 0 } \\ { b = - 3 } \end{array} \right.
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k-3=0
Consider the first equation. Insert the known values of variables into the equation.
k=3
Add 3 to both sides. Anything plus zero gives itself.
k=3 b=-3
The system is now solved.
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