Solve for x
x=\frac{2\left(y-9\right)}{9}
Solve for y
y=\frac{9\left(x+2\right)}{2}
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9x+18=2y
Add 2y to both sides. Anything plus zero gives itself.
9x=2y-18
Subtract 18 from both sides.
\frac{9x}{9}=\frac{2y-18}{9}
Divide both sides by 9.
x=\frac{2y-18}{9}
Dividing by 9 undoes the multiplication by 9.
x=\frac{2y}{9}-2
Divide -18+2y by 9.
-2y+18=-9x
Subtract 9x from both sides. Anything subtracted from zero gives its negation.
-2y=-9x-18
Subtract 18 from both sides.
\frac{-2y}{-2}=\frac{-9x-18}{-2}
Divide both sides by -2.
y=\frac{-9x-18}{-2}
Dividing by -2 undoes the multiplication by -2.
y=\frac{9x}{2}+9
Divide -9x-18 by -2.
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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