\left\{ \begin{array} { l } { 2 x + 7 y = 22 } \end{array} \right.
Solve for x
x=-\frac{7y}{2}+11
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2x=22-7y
Subtract 7y from both sides.
\frac{2x}{2}=\frac{22-7y}{2}
Divide both sides by 2.
x=\frac{22-7y}{2}
Dividing by 2 undoes the multiplication by 2.
x=-\frac{7y}{2}+11
Divide 22-7y by 2.
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