Solve for x
x>3
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7x>18+3
Add 3 to both sides.
7x>21
Add 18 and 3 to get 21.
x>\frac{21}{7}
Divide both sides by 7. Since 7 is positive, the inequality direction remains the same.
x>3
Divide 21 by 7 to get 3.
Examples
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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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