Solve for k
k=8
Share
Copied to clipboard
-1.4k+9.8+7=5.6
Use the distributive property to multiply -1.4 by k-7.
-1.4k+16.8=5.6
Add 9.8 and 7 to get 16.8.
-1.4k=5.6-16.8
Subtract 16.8 from both sides.
-1.4k=-11.2
Subtract 16.8 from 5.6 to get -11.2.
k=\frac{-11.2}{-1.4}
Divide both sides by -1.4.
k=\frac{-112}{-14}
Expand \frac{-11.2}{-1.4} by multiplying both numerator and the denominator by 10.
k=8
Divide -112 by -14 to get 8.
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}