Solve for n
n=-3
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7+2n=3-2n-8
Use the distributive property to multiply -2 by n+4.
7+2n=-5-2n
Subtract 8 from 3 to get -5.
7+2n+2n=-5
Add 2n to both sides.
7+4n=-5
Combine 2n and 2n to get 4n.
4n=-5-7
Subtract 7 from both sides.
4n=-12
Subtract 7 from -5 to get -12.
n=\frac{-12}{4}
Divide both sides by 4.
n=-3
Divide -12 by 4 to get -3.
Examples
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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
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Limits
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