Solve for x
x=3\left(y+5\right)
Solve for y
y=\frac{x-15}{3}
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3y+15=x
Multiply both sides of the equation by 3.
x=3y+15
Swap sides so that all variable terms are on the left hand side.
3y+15=x
Multiply both sides of the equation by 3.
3y=x-15
Subtract 15 from both sides.
\frac{3y}{3}=\frac{x-15}{3}
Divide both sides by 3.
y=\frac{x-15}{3}
Dividing by 3 undoes the multiplication by 3.
y=\frac{x}{3}-5
Divide x-15 by 3.
Examples
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y = 3x + 4
Arithmetic
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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
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Limits
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