Solve for z
z\leq -5
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7z-2-9z\geq 8
Subtract 9z from both sides.
-2z-2\geq 8
Combine 7z and -9z to get -2z.
-2z\geq 8+2
Add 2 to both sides.
-2z\geq 10
Add 8 and 2 to get 10.
z\leq \frac{10}{-2}
Divide both sides by -2. Since -2 is negative, the inequality direction is changed.
z\leq -5
Divide 10 by -2 to get -5.
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
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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