\left\{ \begin{array} { l } { 2 x + y = 3 } \\ { y = 4 } \end{array} \right.
Solve for x, y
x=-\frac{1}{2}=-0.5
y=4
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\left\{ \begin{array} { l } { 2 x + y = 3 } \\ { y = 4 } \end{array} \right.
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2x+4=3
Consider the first equation. Insert the known values of variables into the equation.
2x=3-4
Subtract 4 from both sides.
2x=-1
Subtract 4 from 3 to get -1.
x=-\frac{1}{2}
Divide both sides by 2.
x=-\frac{1}{2} y=4
The system is now solved.
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