\sum x - 1 = 8
Solve for x
x=\frac{9}{Σ}
Σ\neq 0
Solve for Σ
Σ=\frac{9}{x}
x\neq 0
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Σx=8+1
Add 1 to both sides.
Σx=9
Add 8 and 1 to get 9.
\frac{Σx}{Σ}=\frac{9}{Σ}
Divide both sides by Σ.
x=\frac{9}{Σ}
Dividing by Σ undoes the multiplication by Σ.
Σx=8+1
Add 1 to both sides.
Σx=9
Add 8 and 1 to get 9.
xΣ=9
The equation is in standard form.
\frac{xΣ}{x}=\frac{9}{x}
Divide both sides by x.
Σ=\frac{9}{x}
Dividing by x undoes the multiplication by x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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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