\left\{ \begin{array} { l } { a = - 4 } \\ { a + b = 4 } \end{array} \right.
Solve for a, b
a=-4
b=8
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\left\{ \begin{array} { l } { a = - 4 } \\ { a + b = 4 } \end{array} \right.
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-4+b=4
Consider the second equation. Insert the known values of variables into the equation.
b=4+4
Add 4 to both sides.
b=8
Add 4 and 4 to get 8.
a=-4 b=8
The system is now solved.
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