Solve for x
x=-\frac{5y}{8}
Solve for y
y=-\frac{8x}{5}
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4x-5y-12x=0
Subtract 12x from both sides.
-8x-5y=0
Combine 4x and -12x to get -8x.
-8x=5y
Add 5y to both sides. Anything plus zero gives itself.
\frac{-8x}{-8}=\frac{5y}{-8}
Divide both sides by -8.
x=\frac{5y}{-8}
Dividing by -8 undoes the multiplication by -8.
x=-\frac{5y}{8}
Divide 5y by -8.
-5y=12x-4x
Subtract 4x from both sides.
-5y=8x
Combine 12x and -4x to get 8x.
\frac{-5y}{-5}=\frac{8x}{-5}
Divide both sides by -5.
y=\frac{8x}{-5}
Dividing by -5 undoes the multiplication by -5.
y=-\frac{8x}{5}
Divide 8x by -5.
Examples
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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