Solve for x
x=9
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2x=13+5
Add 5 to both sides.
2x=18
Add 13 and 5 to get 18.
x=\frac{18}{2}
Divide both sides by 2.
x=9
Divide 18 by 2 to get 9.
Examples
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Matrix
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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