Solve for u
u=3
Share
Copied to clipboard
4.9-6.1u+3.2u=-3.8
Add 3.2u to both sides.
4.9-2.9u=-3.8
Combine -6.1u and 3.2u to get -2.9u.
-2.9u=-3.8-4.9
Subtract 4.9 from both sides.
-2.9u=-8.7
Subtract 4.9 from -3.8 to get -8.7.
u=\frac{-8.7}{-2.9}
Divide both sides by -2.9.
u=\frac{-87}{-29}
Expand \frac{-8.7}{-2.9} by multiplying both numerator and the denominator by 10.
u=3
Divide -87 by -29 to get 3.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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}