Solve for x
x=\frac{y-3}{7}
Solve for y
y=7x+3
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7x+3=y
Swap sides so that all variable terms are on the left hand side.
7x=y-3
Subtract 3 from both sides.
\frac{7x}{7}=\frac{y-3}{7}
Divide both sides by 7.
x=\frac{y-3}{7}
Dividing by 7 undoes the multiplication by 7.
Examples
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Linear equation
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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