Solve for x
x=\frac{1}{3}\approx 0.333333333
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3x+15=16
Square both sides of the equation.
3x+15-15=16-15
Subtract 15 from both sides of the equation.
3x=16-15
Subtracting 15 from itself leaves 0.
3x=1
Subtract 15 from 16.
\frac{3x}{3}=\frac{1}{3}
Divide both sides by 3.
x=\frac{1}{3}
Dividing by 3 undoes the multiplication by 3.
Examples
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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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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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