Solve for y
y=\sqrt{2}\approx 1.414213562
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\sqrt{2}y=6-4
Subtract 4 from both sides.
\sqrt{2}y=2
Subtract 4 from 6 to get 2.
\frac{\sqrt{2}y}{\sqrt{2}}=\frac{2}{\sqrt{2}}
Divide both sides by \sqrt{2}.
y=\frac{2}{\sqrt{2}}
Dividing by \sqrt{2} undoes the multiplication by \sqrt{2}.
y=\sqrt{2}
Divide 2 by \sqrt{2}.
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