Solve for x
x<10
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20+8.5x-6.3x<42
Subtract 6.3x from both sides.
20+2.2x<42
Combine 8.5x and -6.3x to get 2.2x.
2.2x<42-20
Subtract 20 from both sides.
2.2x<22
Subtract 20 from 42 to get 22.
x<\frac{22}{2.2}
Divide both sides by 2.2. Since 2.2 is positive, the inequality direction remains the same.
x<\frac{220}{22}
Expand \frac{22}{2.2} by multiplying both numerator and the denominator by 10.
x<10
Divide 220 by 22 to get 10.
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}