Solve for f
f=2
Share
Copied to clipboard
\frac{1}{5}\times 2f+\frac{1}{5}\left(-3\right)+\frac{1}{6}\left(f-4\right)+\frac{2}{15}=0
Use the distributive property to multiply \frac{1}{5} by 2f-3.
\frac{2}{5}f+\frac{1}{5}\left(-3\right)+\frac{1}{6}\left(f-4\right)+\frac{2}{15}=0
Multiply \frac{1}{5} and 2 to get \frac{2}{5}.
\frac{2}{5}f+\frac{-3}{5}+\frac{1}{6}\left(f-4\right)+\frac{2}{15}=0
Multiply \frac{1}{5} and -3 to get \frac{-3}{5}.
\frac{2}{5}f-\frac{3}{5}+\frac{1}{6}\left(f-4\right)+\frac{2}{15}=0
Fraction \frac{-3}{5} can be rewritten as -\frac{3}{5} by extracting the negative sign.
\frac{2}{5}f-\frac{3}{5}+\frac{1}{6}f+\frac{1}{6}\left(-4\right)+\frac{2}{15}=0
Use the distributive property to multiply \frac{1}{6} by f-4.
\frac{2}{5}f-\frac{3}{5}+\frac{1}{6}f+\frac{-4}{6}+\frac{2}{15}=0
Multiply \frac{1}{6} and -4 to get \frac{-4}{6}.
\frac{2}{5}f-\frac{3}{5}+\frac{1}{6}f-\frac{2}{3}+\frac{2}{15}=0
Reduce the fraction \frac{-4}{6} to lowest terms by extracting and canceling out 2.
\frac{17}{30}f-\frac{3}{5}-\frac{2}{3}+\frac{2}{15}=0
Combine \frac{2}{5}f and \frac{1}{6}f to get \frac{17}{30}f.
\frac{17}{30}f-\frac{9}{15}-\frac{10}{15}+\frac{2}{15}=0
Least common multiple of 5 and 3 is 15. Convert -\frac{3}{5} and \frac{2}{3} to fractions with denominator 15.
\frac{17}{30}f+\frac{-9-10}{15}+\frac{2}{15}=0
Since -\frac{9}{15} and \frac{10}{15} have the same denominator, subtract them by subtracting their numerators.
\frac{17}{30}f-\frac{19}{15}+\frac{2}{15}=0
Subtract 10 from -9 to get -19.
\frac{17}{30}f+\frac{-19+2}{15}=0
Since -\frac{19}{15} and \frac{2}{15} have the same denominator, add them by adding their numerators.
\frac{17}{30}f-\frac{17}{15}=0
Add -19 and 2 to get -17.
\frac{17}{30}f=\frac{17}{15}
Add \frac{17}{15} to both sides. Anything plus zero gives itself.
f=\frac{17}{15}\times \frac{30}{17}
Multiply both sides by \frac{30}{17}, the reciprocal of \frac{17}{30}.
f=\frac{17\times 30}{15\times 17}
Multiply \frac{17}{15} times \frac{30}{17} by multiplying numerator times numerator and denominator times denominator.
f=\frac{30}{15}
Cancel out 17 in both numerator and denominator.
f=2
Divide 30 by 15 to get 2.
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}