Solve for y
y=1
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-2\sqrt{2-y}=2-4
Multiply both sides of the equation by -2.
-2\sqrt{2-y}=-2
Subtract 4 from 2 to get -2.
\sqrt{2-y}=\frac{-2}{-2}
Divide both sides by -2.
\sqrt{2-y}=1
Divide -2 by -2 to get 1.
-y+2=1
Square both sides of the equation.
-y+2-2=1-2
Subtract 2 from both sides of the equation.
-y=1-2
Subtracting 2 from itself leaves 0.
-y=-1
Subtract 2 from 1.
\frac{-y}{-1}=-\frac{1}{-1}
Divide both sides by -1.
y=-\frac{1}{-1}
Dividing by -1 undoes the multiplication by -1.
y=1
Divide -1 by -1.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}