Solve for x
x=\frac{1}{5}=0.2
x=2
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Quadratic Equation
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\frac { 3 x - 2 } { 2 x + 1 } = \frac { x + 2 } { 4 x - 3 }
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\left(4x-3\right)\left(3x-2\right)=\left(2x+1\right)\left(x+2\right)
Variable x cannot be equal to any of the values -\frac{1}{2},\frac{3}{4} since division by zero is not defined. Multiply both sides of the equation by \left(4x-3\right)\left(2x+1\right), the least common multiple of 2x+1,4x-3.
12x^{2}-17x+6=\left(2x+1\right)\left(x+2\right)
Use the distributive property to multiply 4x-3 by 3x-2 and combine like terms.
12x^{2}-17x+6=2x^{2}+5x+2
Use the distributive property to multiply 2x+1 by x+2 and combine like terms.
12x^{2}-17x+6-2x^{2}=5x+2
Subtract 2x^{2} from both sides.
10x^{2}-17x+6=5x+2
Combine 12x^{2} and -2x^{2} to get 10x^{2}.
10x^{2}-17x+6-5x=2
Subtract 5x from both sides.
10x^{2}-22x+6=2
Combine -17x and -5x to get -22x.
10x^{2}-22x+6-2=0
Subtract 2 from both sides.
10x^{2}-22x+4=0
Subtract 2 from 6 to get 4.
x=\frac{-\left(-22\right)±\sqrt{\left(-22\right)^{2}-4\times 10\times 4}}{2\times 10}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 10 for a, -22 for b, and 4 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-\left(-22\right)±\sqrt{484-4\times 10\times 4}}{2\times 10}
Square -22.
x=\frac{-\left(-22\right)±\sqrt{484-40\times 4}}{2\times 10}
Multiply -4 times 10.
x=\frac{-\left(-22\right)±\sqrt{484-160}}{2\times 10}
Multiply -40 times 4.
x=\frac{-\left(-22\right)±\sqrt{324}}{2\times 10}
Add 484 to -160.
x=\frac{-\left(-22\right)±18}{2\times 10}
Take the square root of 324.
x=\frac{22±18}{2\times 10}
The opposite of -22 is 22.
x=\frac{22±18}{20}
Multiply 2 times 10.
x=\frac{40}{20}
Now solve the equation x=\frac{22±18}{20} when ± is plus. Add 22 to 18.
x=2
Divide 40 by 20.
x=\frac{4}{20}
Now solve the equation x=\frac{22±18}{20} when ± is minus. Subtract 18 from 22.
x=\frac{1}{5}
Reduce the fraction \frac{4}{20} to lowest terms by extracting and canceling out 4.
x=2 x=\frac{1}{5}
The equation is now solved.
\left(4x-3\right)\left(3x-2\right)=\left(2x+1\right)\left(x+2\right)
Variable x cannot be equal to any of the values -\frac{1}{2},\frac{3}{4} since division by zero is not defined. Multiply both sides of the equation by \left(4x-3\right)\left(2x+1\right), the least common multiple of 2x+1,4x-3.
12x^{2}-17x+6=\left(2x+1\right)\left(x+2\right)
Use the distributive property to multiply 4x-3 by 3x-2 and combine like terms.
12x^{2}-17x+6=2x^{2}+5x+2
Use the distributive property to multiply 2x+1 by x+2 and combine like terms.
12x^{2}-17x+6-2x^{2}=5x+2
Subtract 2x^{2} from both sides.
10x^{2}-17x+6=5x+2
Combine 12x^{2} and -2x^{2} to get 10x^{2}.
10x^{2}-17x+6-5x=2
Subtract 5x from both sides.
10x^{2}-22x+6=2
Combine -17x and -5x to get -22x.
10x^{2}-22x=2-6
Subtract 6 from both sides.
10x^{2}-22x=-4
Subtract 6 from 2 to get -4.
\frac{10x^{2}-22x}{10}=-\frac{4}{10}
Divide both sides by 10.
x^{2}+\left(-\frac{22}{10}\right)x=-\frac{4}{10}
Dividing by 10 undoes the multiplication by 10.
x^{2}-\frac{11}{5}x=-\frac{4}{10}
Reduce the fraction \frac{-22}{10} to lowest terms by extracting and canceling out 2.
x^{2}-\frac{11}{5}x=-\frac{2}{5}
Reduce the fraction \frac{-4}{10} to lowest terms by extracting and canceling out 2.
x^{2}-\frac{11}{5}x+\left(-\frac{11}{10}\right)^{2}=-\frac{2}{5}+\left(-\frac{11}{10}\right)^{2}
Divide -\frac{11}{5}, the coefficient of the x term, by 2 to get -\frac{11}{10}. Then add the square of -\frac{11}{10} to both sides of the equation. This step makes the left hand side of the equation a perfect square.
x^{2}-\frac{11}{5}x+\frac{121}{100}=-\frac{2}{5}+\frac{121}{100}
Square -\frac{11}{10} by squaring both the numerator and the denominator of the fraction.
x^{2}-\frac{11}{5}x+\frac{121}{100}=\frac{81}{100}
Add -\frac{2}{5} to \frac{121}{100} by finding a common denominator and adding the numerators. Then reduce the fraction to lowest terms if possible.
\left(x-\frac{11}{10}\right)^{2}=\frac{81}{100}
Factor x^{2}-\frac{11}{5}x+\frac{121}{100}. In general, when x^{2}+bx+c is a perfect square, it can always be factored as \left(x+\frac{b}{2}\right)^{2}.
\sqrt{\left(x-\frac{11}{10}\right)^{2}}=\sqrt{\frac{81}{100}}
Take the square root of both sides of the equation.
x-\frac{11}{10}=\frac{9}{10} x-\frac{11}{10}=-\frac{9}{10}
Simplify.
x=2 x=\frac{1}{5}
Add \frac{11}{10} to both sides of the equation.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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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}