\left\{ \begin{array} { l } { x - 3 = y } \\ { y + 1 = 20 } \end{array} \right.
Solve for x, y
x=22
y=19
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y=20-1
Consider the second equation. Subtract 1 from both sides.
y=19
Subtract 1 from 20 to get 19.
x-3=19
Consider the first equation. Insert the known values of variables into the equation.
x=19+3
Add 3 to both sides.
x=22
Add 19 and 3 to get 22.
x=22 y=19
The system is now solved.
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