Solve for x
x=35
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30\left(\frac{0}{10}+\frac{x}{5}\right)\left(3\times 7+1\right)-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply both sides of the equation by 210, the least common multiple of 10,5,7,3.
30\left(0+\frac{x}{5}\right)\left(3\times 7+1\right)-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Zero divided by any non-zero number gives zero.
30\times \frac{x}{5}\left(3\times 7+1\right)-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Anything plus zero gives itself.
30\times \frac{x}{5}\left(21+1\right)-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 3 and 7 to get 21.
30\times \frac{x}{5}\times 22-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Add 21 and 1 to get 22.
660\times \frac{x}{5}-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 30 and 22 to get 660.
132x-21\left(15\times 10+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Cancel out 5, the greatest common factor in 660 and 5.
132x-21\left(150+3\right)=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 15 and 10 to get 150.
132x-21\times 153=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Add 150 and 3 to get 153.
132x-3213=7\left(6\times 10+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply -21 and 153 to get -3213.
132x-3213=7\left(60+7\right)\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 6 and 10 to get 60.
132x-3213=7\times 67\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Add 60 and 7 to get 67.
132x-3213=469\left(13\times 3+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 7 and 67 to get 469.
132x-3213=469\left(39+1\right)-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 13 and 3 to get 39.
132x-3213=469\times 40-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Add 39 and 1 to get 40.
132x-3213=18760-7\left(6\times 10+7\right)\left(12\times 3+1\right)
Multiply 469 and 40 to get 18760.
132x-3213=18760-7\left(60+7\right)\left(12\times 3+1\right)
Multiply 6 and 10 to get 60.
132x-3213=18760-7\times 67\left(12\times 3+1\right)
Add 60 and 7 to get 67.
132x-3213=18760-469\left(12\times 3+1\right)
Multiply 7 and 67 to get 469.
132x-3213=18760-469\left(36+1\right)
Multiply 12 and 3 to get 36.
132x-3213=18760-469\times 37
Add 36 and 1 to get 37.
132x-3213=18760-17353
Multiply 469 and 37 to get 17353.
132x-3213=1407
Subtract 17353 from 18760 to get 1407.
132x=1407+3213
Add 3213 to both sides.
132x=4620
Add 1407 and 3213 to get 4620.
x=\frac{4620}{132}
Divide both sides by 132.
x=35
Divide 4620 by 132 to get 35.
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}