Solve for x
x = \frac{7}{2} = 3\frac{1}{2} = 3.5
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\frac{1}{2}+x=4
Swap sides so that all variable terms are on the left hand side.
x=4-\frac{1}{2}
Subtract \frac{1}{2} from both sides.
x=\frac{8}{2}-\frac{1}{2}
Convert 4 to fraction \frac{8}{2}.
x=\frac{8-1}{2}
Since \frac{8}{2} and \frac{1}{2} have the same denominator, subtract them by subtracting their numerators.
x=\frac{7}{2}
Subtract 1 from 8 to get 7.
Examples
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Linear equation
y = 3x + 4
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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