Solve for x
x=-\frac{4y}{9}+4
Solve for y
y=-\frac{9x}{4}+9
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9x+4y=36
Calculate 6 to the power of 2 and get 36.
9x=36-4y
Subtract 4y from both sides.
\frac{9x}{9}=\frac{36-4y}{9}
Divide both sides by 9.
x=\frac{36-4y}{9}
Dividing by 9 undoes the multiplication by 9.
x=-\frac{4y}{9}+4
Divide 36-4y by 9.
9x+4y=36
Calculate 6 to the power of 2 and get 36.
4y=36-9x
Subtract 9x from both sides.
\frac{4y}{4}=\frac{36-9x}{4}
Divide both sides by 4.
y=\frac{36-9x}{4}
Dividing by 4 undoes the multiplication by 4.
y=-\frac{9x}{4}+9
Divide 36-9x by 4.
Examples
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4 \sin \theta \cos \theta = 2 \sin \theta
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Matrix
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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
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