Solve for y
y=\frac{39}{40}=0.975
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Linear Equation
5 problems similar to:
- \frac { 1 } { 2 } = \frac { 4 } { 3 } y - \frac { 9 } { 5 }
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\frac{4}{3}y-\frac{9}{5}=-\frac{1}{2}
Swap sides so that all variable terms are on the left hand side.
\frac{4}{3}y=-\frac{1}{2}+\frac{9}{5}
Add \frac{9}{5} to both sides.
\frac{4}{3}y=-\frac{5}{10}+\frac{18}{10}
Least common multiple of 2 and 5 is 10. Convert -\frac{1}{2} and \frac{9}{5} to fractions with denominator 10.
\frac{4}{3}y=\frac{-5+18}{10}
Since -\frac{5}{10} and \frac{18}{10} have the same denominator, add them by adding their numerators.
\frac{4}{3}y=\frac{13}{10}
Add -5 and 18 to get 13.
y=\frac{13}{10}\times \frac{3}{4}
Multiply both sides by \frac{3}{4}, the reciprocal of \frac{4}{3}.
y=\frac{13\times 3}{10\times 4}
Multiply \frac{13}{10} times \frac{3}{4} by multiplying numerator times numerator and denominator times denominator.
y=\frac{39}{40}
Do the multiplications in the fraction \frac{13\times 3}{10\times 4}.
Examples
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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}