Solve for k
k=\frac{79}{86}\approx 0.918604651
Share
Copied to clipboard
4k-4+\frac{4}{5}\left(k+1\right)=\frac{1}{4}\left(2k+3\right)
Use the distributive property to multiply 4 by k-1.
4k-4+\frac{4}{5}k+\frac{4}{5}=\frac{1}{4}\left(2k+3\right)
Use the distributive property to multiply \frac{4}{5} by k+1.
\frac{24}{5}k-4+\frac{4}{5}=\frac{1}{4}\left(2k+3\right)
Combine 4k and \frac{4}{5}k to get \frac{24}{5}k.
\frac{24}{5}k-\frac{20}{5}+\frac{4}{5}=\frac{1}{4}\left(2k+3\right)
Convert -4 to fraction -\frac{20}{5}.
\frac{24}{5}k+\frac{-20+4}{5}=\frac{1}{4}\left(2k+3\right)
Since -\frac{20}{5} and \frac{4}{5} have the same denominator, add them by adding their numerators.
\frac{24}{5}k-\frac{16}{5}=\frac{1}{4}\left(2k+3\right)
Add -20 and 4 to get -16.
\frac{24}{5}k-\frac{16}{5}=\frac{1}{4}\times 2k+\frac{1}{4}\times 3
Use the distributive property to multiply \frac{1}{4} by 2k+3.
\frac{24}{5}k-\frac{16}{5}=\frac{2}{4}k+\frac{1}{4}\times 3
Multiply \frac{1}{4} and 2 to get \frac{2}{4}.
\frac{24}{5}k-\frac{16}{5}=\frac{1}{2}k+\frac{1}{4}\times 3
Reduce the fraction \frac{2}{4} to lowest terms by extracting and canceling out 2.
\frac{24}{5}k-\frac{16}{5}=\frac{1}{2}k+\frac{3}{4}
Multiply \frac{1}{4} and 3 to get \frac{3}{4}.
\frac{24}{5}k-\frac{16}{5}-\frac{1}{2}k=\frac{3}{4}
Subtract \frac{1}{2}k from both sides.
\frac{43}{10}k-\frac{16}{5}=\frac{3}{4}
Combine \frac{24}{5}k and -\frac{1}{2}k to get \frac{43}{10}k.
\frac{43}{10}k=\frac{3}{4}+\frac{16}{5}
Add \frac{16}{5} to both sides.
\frac{43}{10}k=\frac{15}{20}+\frac{64}{20}
Least common multiple of 4 and 5 is 20. Convert \frac{3}{4} and \frac{16}{5} to fractions with denominator 20.
\frac{43}{10}k=\frac{15+64}{20}
Since \frac{15}{20} and \frac{64}{20} have the same denominator, add them by adding their numerators.
\frac{43}{10}k=\frac{79}{20}
Add 15 and 64 to get 79.
k=\frac{79}{20}\times \frac{10}{43}
Multiply both sides by \frac{10}{43}, the reciprocal of \frac{43}{10}.
k=\frac{79\times 10}{20\times 43}
Multiply \frac{79}{20} times \frac{10}{43} by multiplying numerator times numerator and denominator times denominator.
k=\frac{790}{860}
Do the multiplications in the fraction \frac{79\times 10}{20\times 43}.
k=\frac{79}{86}
Reduce the fraction \frac{790}{860} to lowest terms by extracting and canceling out 10.
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}