Solve for x
x\in \mathrm{R}
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18x-6-5\left(4x-3\right)\leq 9-2x
Use the distributive property to multiply 6 by 3x-1.
18x-6-20x+15\leq 9-2x
Use the distributive property to multiply -5 by 4x-3.
-2x-6+15\leq 9-2x
Combine 18x and -20x to get -2x.
-2x+9\leq 9-2x
Add -6 and 15 to get 9.
-2x+9+2x\leq 9
Add 2x to both sides.
9\leq 9
Combine -2x and 2x to get 0.
x\in \mathrm{R}
This is true for any x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}