\left\{ \begin{array} { l } { x = 4 } \\ { x + 3 = y } \end{array} \right.
Solve for x, y
x=4
y=7
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\left\{ \begin{array} { l } { x = 4 } \\ { x + 3 = y } \end{array} \right.
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4+3=y
Consider the second equation. Insert the known values of variables into the equation.
7=y
Add 4 and 3 to get 7.
y=7
Swap sides so that all variable terms are on the left hand side.
x=4 y=7
The system is now solved.
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