Solve for b
b = -\frac{13}{2} = -6\frac{1}{2} = -6.5
Share
Copied to clipboard
10\left(b-1\right)-6\left(2b-2\right)=15
Multiply both sides of the equation by 30, the least common multiple of 3,5,2.
10b-10-6\left(2b-2\right)=15
Use the distributive property to multiply 10 by b-1.
10b-10-12b+12=15
Use the distributive property to multiply -6 by 2b-2.
-2b-10+12=15
Combine 10b and -12b to get -2b.
-2b+2=15
Add -10 and 12 to get 2.
-2b=15-2
Subtract 2 from both sides.
-2b=13
Subtract 2 from 15 to get 13.
b=\frac{13}{-2}
Divide both sides by -2.
b=-\frac{13}{2}
Fraction \frac{13}{-2} can be rewritten as -\frac{13}{2} by extracting the negative sign.
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}