Solve for y
y=5
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65-5y=9y-\left(2y-5\right)
Use the distributive property to multiply 5 by 13-y.
65-5y=9y-2y-\left(-5\right)
To find the opposite of 2y-5, find the opposite of each term.
65-5y=9y-2y+5
The opposite of -5 is 5.
65-5y=7y+5
Combine 9y and -2y to get 7y.
65-5y-7y=5
Subtract 7y from both sides.
65-12y=5
Combine -5y and -7y to get -12y.
-12y=5-65
Subtract 65 from both sides.
-12y=-60
Subtract 65 from 5 to get -60.
y=\frac{-60}{-12}
Divide both sides by -12.
y=5
Divide -60 by -12 to get 5.
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
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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}