Solve for x
x = \frac{21}{5} = 4\frac{1}{5} = 4.2
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7\times 6=10x
Multiply both sides of the equation by 350, the least common multiple of 50,35.
42=10x
Multiply 7 and 6 to get 42.
10x=42
Swap sides so that all variable terms are on the left hand side.
x=\frac{42}{10}
Divide both sides by 10.
x=\frac{21}{5}
Reduce the fraction \frac{42}{10} to lowest terms by extracting and canceling out 2.
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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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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