Solve for x
x<7
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4x<20+8
Add 8 to both sides.
4x<28
Add 20 and 8 to get 28.
x<\frac{28}{4}
Divide both sides by 4. Since 4 is positive, the inequality direction remains the same.
x<7
Divide 28 by 4 to get 7.
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
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Matrix
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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
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Limits
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