Solve for x
x=-2y-4
Solve for y
y=-\frac{x}{2}-2
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-2x-8=4y
Add 4y to both sides. Anything plus zero gives itself.
-2x=4y+8
Add 8 to both sides.
\frac{-2x}{-2}=\frac{4y+8}{-2}
Divide both sides by -2.
x=\frac{4y+8}{-2}
Dividing by -2 undoes the multiplication by -2.
x=-2y-4
Divide 8+4y by -2.
-4y-8=2x
Add 2x to both sides. Anything plus zero gives itself.
-4y=2x+8
Add 8 to both sides.
\frac{-4y}{-4}=\frac{2x+8}{-4}
Divide both sides by -4.
y=\frac{2x+8}{-4}
Dividing by -4 undoes the multiplication by -4.
y=-\frac{x}{2}-2
Divide 8+2x by -4.
Examples
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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