Solve for y
y=-10
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5y+40=y
Multiply both sides of the equation by 5.
5y+40-y=0
Subtract y from both sides.
4y+40=0
Combine 5y and -y to get 4y.
4y=-40
Subtract 40 from both sides. Anything subtracted from zero gives its negation.
y=\frac{-40}{4}
Divide both sides by 4.
y=-10
Divide -40 by 4 to get -10.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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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
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