Solve for x
x\leq 17
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9\times 2\geq 1+x
Multiply both sides by 2. Since 2 is positive, the inequality direction remains the same.
18\geq 1+x
Multiply 9 and 2 to get 18.
1+x\leq 18
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
x\leq 18-1
Subtract 1 from both sides.
x\leq 17
Subtract 1 from 18 to get 17.
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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