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3
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\frac{\left(1\times 4+3\right)\times 12}{4\times 7}
Divide \frac{1\times 4+3}{4} by \frac{7}{12} by multiplying \frac{1\times 4+3}{4} by the reciprocal of \frac{7}{12}.
\frac{3\left(3+4\right)}{7}
Cancel out 4 in both numerator and denominator.
\frac{3\times 7}{7}
Add 3 and 4 to get 7.
\frac{21}{7}
Multiply 3 and 7 to get 21.
3
Divide 21 by 7 to get 3.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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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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