Solve for x
x=\frac{1-y}{4}
Solve for y
y=1-4x
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y=1-4x
Subtract 7 from 8 to get 1.
1-4x=y
Swap sides so that all variable terms are on the left hand side.
-4x=y-1
Subtract 1 from both sides.
\frac{-4x}{-4}=\frac{y-1}{-4}
Divide both sides by -4.
x=\frac{y-1}{-4}
Dividing by -4 undoes the multiplication by -4.
x=\frac{1-y}{4}
Divide y-1 by -4.
y=1-4x
Subtract 7 from 8 to get 1.
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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