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\left(y+2\right)\left(x+2\right)=z-3
Multiply both sides of the equation by \left(y-2\right)\left(y+2\right), the least common multiple of y-2,y^{2}-4.
yx+2y+2x+4=z-3
Use the distributive property to multiply y+2 by x+2.
yx+2x+4=z-3-2y
Subtract 2y from both sides.
yx+2x=z-3-2y-4
Subtract 4 from both sides.
yx+2x=z-7-2y
Subtract 4 from -3 to get -7.
\left(y+2\right)x=z-7-2y
Combine all terms containing x.
\left(y+2\right)x=-2y+z-7
The equation is in standard form.
\frac{\left(y+2\right)x}{y+2}=\frac{-2y+z-7}{y+2}
Divide both sides by y+2.
x=\frac{-2y+z-7}{y+2}
Dividing by y+2 undoes the multiplication by y+2.
\left(y+2\right)\left(x+2\right)=z-3
Variable y cannot be equal to any of the values -2,2 since division by zero is not defined. Multiply both sides of the equation by \left(y-2\right)\left(y+2\right), the least common multiple of y-2,y^{2}-4.
yx+2y+2x+4=z-3
Use the distributive property to multiply y+2 by x+2.
yx+2y+4=z-3-2x
Subtract 2x from both sides.
yx+2y=z-3-2x-4
Subtract 4 from both sides.
yx+2y=z-7-2x
Subtract 4 from -3 to get -7.
\left(x+2\right)y=z-7-2x
Combine all terms containing y.
\left(x+2\right)y=-2x+z-7
The equation is in standard form.
\frac{\left(x+2\right)y}{x+2}=\frac{-2x+z-7}{x+2}
Divide both sides by x+2.
y=\frac{-2x+z-7}{x+2}
Dividing by x+2 undoes the multiplication by x+2.
y=\frac{-2x+z-7}{x+2}\text{, }y\neq -2\text{ and }y\neq 2
Variable y cannot be equal to any of the values -2,2.