Solve for v
v=5
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-25\left(4\times 6+1\right)-84\left(-\frac{v}{3}\right)=-5\left(3\times 30+7\right)
Multiply both sides of the equation by 150, the least common multiple of 6,25,3,30.
-25\left(24+1\right)-84\left(-\frac{v}{3}\right)=-5\left(3\times 30+7\right)
Multiply 4 and 6 to get 24.
-25\times 25-84\left(-\frac{v}{3}\right)=-5\left(3\times 30+7\right)
Add 24 and 1 to get 25.
-625-84\left(-\frac{v}{3}\right)=-5\left(3\times 30+7\right)
Multiply -25 and 25 to get -625.
-625+84\times \frac{v}{3}=-5\left(3\times 30+7\right)
Multiply -84 and -1 to get 84.
-625+84\times \frac{v}{3}=-5\left(90+7\right)
Multiply 3 and 30 to get 90.
-625+84\times \frac{v}{3}=-5\times 97
Add 90 and 7 to get 97.
-625+84\times \frac{v}{3}=-485
Multiply -5 and 97 to get -485.
-625+28v=-485
Cancel out 3, the greatest common factor in 84 and 3.
28v=-485+625
Add 625 to both sides.
28v=140
Add -485 and 625 to get 140.
v=\frac{140}{28}
Divide both sides by 28.
v=5
Divide 140 by 28 to get 5.
Examples
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{ 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}