Solve for x
x=\frac{y-7}{3}
Solve for y
y=3x+7
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-3x=7-y
Subtract y from both sides.
\frac{-3x}{-3}=\frac{7-y}{-3}
Divide both sides by -3.
x=\frac{7-y}{-3}
Dividing by -3 undoes the multiplication by -3.
x=\frac{y-7}{3}
Divide 7-y by -3.
y=7+3x
Add 3x to both sides.
Examples
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Matrix
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Simultaneous equation
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Integration
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Limits
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