Solve for x
x>-3
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x-3x<6
Subtract 3x from both sides.
-2x<6
Combine x and -3x to get -2x.
x>\frac{6}{-2}
Divide both sides by -2. Since -2 is negative, the inequality direction is changed.
x>-3
Divide 6 by -2 to get -3.
Examples
Quadratic equation
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Linear equation
y = 3x + 4
Arithmetic
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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
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Limits
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