Solve for x
x=\frac{y-7}{4}
Solve for y
y=4x+7
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4x=y-7
Subtract 7 from both sides.
\frac{4x}{4}=\frac{y-7}{4}
Divide both sides by 4.
x=\frac{y-7}{4}
Dividing by 4 undoes the multiplication by 4.
y=4x+7
Swap sides so that all variable terms are on the left hand side.
Examples
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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