Solve for a
a=93
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a+87=180
Add 45 and 42 to get 87.
a=180-87
Subtract 87 from both sides.
a=93
Subtract 87 from 180 to get 93.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
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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 ) }
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Limits
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