Solve for x
x = \frac{13}{2} = 6\frac{1}{2} = 6.5
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2x+5-4x=-8
Subtract 4x from both sides.
-2x+5=-8
Combine 2x and -4x to get -2x.
-2x=-8-5
Subtract 5 from both sides.
-2x=-13
Subtract 5 from -8 to get -13.
x=\frac{-13}{-2}
Divide both sides by -2.
x=\frac{13}{2}
Fraction \frac{-13}{-2} can be simplified to \frac{13}{2} by removing the negative sign from both the numerator and the denominator.
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
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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}