Evaluate
\frac{23x}{21}+y
Factor
\frac{23x+21y}{21}
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\frac{x+2x}{3}-\frac{y}{5}+\frac{6y}{5}-\frac{4x}{3}+\frac{10x}{7}
Since \frac{x}{3} and \frac{2x}{3} have the same denominator, add them by adding their numerators.
\frac{3x}{3}-\frac{y}{5}+\frac{6y}{5}-\frac{4x}{3}+\frac{10x}{7}
Combine like terms in x+2x.
x-\frac{y}{5}+\frac{6y}{5}-\frac{4x}{3}+\frac{10x}{7}
Cancel out 3 and 3.
\frac{5x}{5}-\frac{y}{5}+\frac{6y}{5}-\frac{4x}{3}+\frac{10x}{7}
To add or subtract expressions, expand them to make their denominators the same. Multiply x times \frac{5}{5}.
\frac{5x-y}{5}+\frac{6y}{5}-\frac{4x}{3}+\frac{10x}{7}
Since \frac{5x}{5} and \frac{y}{5} have the same denominator, subtract them by subtracting their numerators.
\frac{5x-y+6y}{5}-\frac{4x}{3}+\frac{10x}{7}
Since \frac{5x-y}{5} and \frac{6y}{5} have the same denominator, add them by adding their numerators.
\frac{5x+5y}{5}-\frac{4x}{3}+\frac{10x}{7}
Combine like terms in 5x-y+6y.
x+y-\frac{4x}{3}+\frac{10x}{7}
Divide each term of 5x+5y by 5 to get x+y.
\frac{3\left(x+y\right)}{3}-\frac{4x}{3}+\frac{10x}{7}
To add or subtract expressions, expand them to make their denominators the same. Multiply x+y times \frac{3}{3}.
\frac{3\left(x+y\right)-4x}{3}+\frac{10x}{7}
Since \frac{3\left(x+y\right)}{3} and \frac{4x}{3} have the same denominator, subtract them by subtracting their numerators.
\frac{3x+3y-4x}{3}+\frac{10x}{7}
Do the multiplications in 3\left(x+y\right)-4x.
\frac{-x+3y}{3}+\frac{10x}{7}
Combine like terms in 3x+3y-4x.
\frac{7\left(-x+3y\right)}{21}+\frac{3\times 10x}{21}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 3 and 7 is 21. Multiply \frac{-x+3y}{3} times \frac{7}{7}. Multiply \frac{10x}{7} times \frac{3}{3}.
\frac{7\left(-x+3y\right)+3\times 10x}{21}
Since \frac{7\left(-x+3y\right)}{21} and \frac{3\times 10x}{21} have the same denominator, add them by adding their numerators.
\frac{-7x+21y+30x}{21}
Do the multiplications in 7\left(-x+3y\right)+3\times 10x.
\frac{23x+21y}{21}
Combine like terms in -7x+21y+30x.
\frac{35x+70x-21y+126y-140x+150x}{105}
Factor out \frac{1}{105}.
115x+105y
Consider 35x+70x-21y+126y-140x+150x. Multiply and combine like terms.
5\left(23x+21y\right)
Consider 115x+105y. Factor out 5.
\frac{23x+21y}{21}
Rewrite the complete factored expression.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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}