Solve for x
x\leq -4
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x-1-2x\geq 3
Subtract 2x from both sides.
-x-1\geq 3
Combine x and -2x to get -x.
-x\geq 3+1
Add 1 to both sides.
-x\geq 4
Add 3 and 1 to get 4.
x\leq -4
Divide both sides by -1. Since -1 is negative, the inequality direction is changed.
Examples
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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
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