\left\{ \begin{array} { l } { a + b = 1 } \\ { 2 + a = 1 } \end{array} \right.
Solve for a, b
a=-1
b=2
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a=1-2
Consider the second equation. Subtract 2 from both sides.
a=-1
Subtract 2 from 1 to get -1.
-1+b=1
Consider the first equation. Insert the known values of variables into the equation.
b=1+1
Add 1 to both sides.
b=2
Add 1 and 1 to get 2.
a=-1 b=2
The system is now solved.
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