Solve for x
x = \frac{357}{80} = 4\frac{37}{80} = 4.4625
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-400x=15-1800
Subtract 1800 from both sides.
-400x=-1785
Subtract 1800 from 15 to get -1785.
x=\frac{-1785}{-400}
Divide both sides by -400.
x=\frac{357}{80}
Reduce the fraction \frac{-1785}{-400} to lowest terms by extracting and canceling out -5.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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