Solve for x
x\geq -4
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12x+5-3x\geq -31
Subtract 3x from both sides.
9x+5\geq -31
Combine 12x and -3x to get 9x.
9x\geq -31-5
Subtract 5 from both sides.
9x\geq -36
Subtract 5 from -31 to get -36.
x\geq \frac{-36}{9}
Divide both sides by 9. Since 9 is positive, the inequality direction remains the same.
x\geq -4
Divide -36 by 9 to get -4.
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
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}