Solve for t
t\leq 12
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t+9\leq 21
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
t\leq 21-9
Subtract 9 from both sides.
t\leq 12
Subtract 9 from 21 to get 12.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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