Solve for x
x = -\frac{9}{8} = -1\frac{1}{8} = -1.125
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-8\times \left(\frac{3}{8}\right)^{2}-3x+2x=0
Multiply both sides of the equation by 8, the least common multiple of 8,4.
-8\times \frac{9}{64}-3x+2x=0
Calculate \frac{3}{8} to the power of 2 and get \frac{9}{64}.
\frac{-8\times 9}{64}-3x+2x=0
Express -8\times \frac{9}{64} as a single fraction.
\frac{-72}{64}-3x+2x=0
Multiply -8 and 9 to get -72.
-\frac{9}{8}-3x+2x=0
Reduce the fraction \frac{-72}{64} to lowest terms by extracting and canceling out 8.
-\frac{9}{8}-x=0
Combine -3x and 2x to get -x.
-x=\frac{9}{8}
Add \frac{9}{8} to both sides. Anything plus zero gives itself.
x=-\frac{9}{8}
Multiply both sides by -1.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}