Solve for u
u = -\frac{17}{5} = -3\frac{2}{5} = -3.4
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7u+7-2u=-10
Subtract 2u from both sides.
5u+7=-10
Combine 7u and -2u to get 5u.
5u=-10-7
Subtract 7 from both sides.
5u=-17
Subtract 7 from -10 to get -17.
u=\frac{-17}{5}
Divide both sides by 5.
u=-\frac{17}{5}
Fraction \frac{-17}{5} can be rewritten as -\frac{17}{5} by extracting the negative sign.
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
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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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