Solve for x
x=-\frac{y}{5}+20
Solve for y
y=100-5x
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5x=100-y
Subtract y from both sides.
\frac{5x}{5}=\frac{100-y}{5}
Divide both sides by 5.
x=\frac{100-y}{5}
Dividing by 5 undoes the multiplication by 5.
x=-\frac{y}{5}+20
Divide 100-y by 5.
y=100-5x
Subtract 5x from both sides.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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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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