Solve for x
x = \frac{5}{2} = 2\frac{1}{2} = 2.5
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-4x=-15+5
Add 5 to both sides.
-4x=-10
Add -15 and 5 to get -10.
x=\frac{-10}{-4}
Divide both sides by -4.
x=\frac{5}{2}
Reduce the fraction \frac{-10}{-4} to lowest terms by extracting and canceling out -2.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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