Solve for x
x = -\frac{5}{2} = -2\frac{1}{2} = -2.5
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x-3x=5
Subtract 3x from both sides.
-2x=5
Combine x and -3x to get -2x.
x=\frac{5}{-2}
Divide both sides by -2.
x=-\frac{5}{2}
Fraction \frac{5}{-2} can be rewritten as -\frac{5}{2} by extracting the negative sign.
Examples
Quadratic equation
{ 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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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