Solve for c
c=3.45
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\frac{-2.8}{-1}=c-0.65
Divide both sides by -1.
\frac{-28}{-10}=c-0.65
Expand \frac{-2.8}{-1} by multiplying both numerator and the denominator by 10.
\frac{14}{5}=c-0.65
Reduce the fraction \frac{-28}{-10} to lowest terms by extracting and canceling out -2.
c-0.65=\frac{14}{5}
Swap sides so that all variable terms are on the left hand side.
c=\frac{14}{5}+0.65
Add 0.65 to both sides.
c=\frac{14}{5}+\frac{13}{20}
Convert decimal number 0.65 to fraction \frac{65}{100}. Reduce the fraction \frac{65}{100} to lowest terms by extracting and canceling out 5.
c=\frac{56}{20}+\frac{13}{20}
Least common multiple of 5 and 20 is 20. Convert \frac{14}{5} and \frac{13}{20} to fractions with denominator 20.
c=\frac{56+13}{20}
Since \frac{56}{20} and \frac{13}{20} have the same denominator, add them by adding their numerators.
c=\frac{69}{20}
Add 56 and 13 to get 69.
Examples
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{ 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}