Solve for x_4
x_{4}=8
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5+x_{4}=13
Swap sides so that all variable terms are on the left hand side.
x_{4}=13-5
Subtract 5 from both sides.
x_{4}=8
Subtract 5 from 13 to get 8.
Examples
Quadratic equation
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Linear equation
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Matrix
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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