Solve for b
b=-\frac{2}{9}\approx -0.222222222
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108\left(-\frac{9\times 6+5}{6}\right)b+27\left(2\times 4+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Multiply both sides of the equation by 108, the least common multiple of 6,4,12,27.
108\left(-\frac{54+5}{6}\right)b+27\left(2\times 4+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Multiply 9 and 6 to get 54.
108\left(-\frac{59}{6}\right)b+27\left(2\times 4+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Add 54 and 5 to get 59.
\frac{108\left(-59\right)}{6}b+27\left(2\times 4+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Express 108\left(-\frac{59}{6}\right) as a single fraction.
\frac{-6372}{6}b+27\left(2\times 4+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Multiply 108 and -59 to get -6372.
-1062b+27\left(2\times 4+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Divide -6372 by 6 to get -1062.
-1062b+27\left(8+3\right)b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Multiply 2 and 4 to get 8.
-1062b+27\times 11b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Add 8 and 3 to get 11.
-1062b+297b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Multiply 27 and 11 to get 297.
-765b+9\left(1\times 12+5\right)b=4\left(1\times 27+7\right)
Combine -1062b and 297b to get -765b.
-765b+9\left(12+5\right)b=4\left(1\times 27+7\right)
Multiply 1 and 12 to get 12.
-765b+9\times 17b=4\left(1\times 27+7\right)
Add 12 and 5 to get 17.
-765b+153b=4\left(1\times 27+7\right)
Multiply 9 and 17 to get 153.
-612b=4\left(1\times 27+7\right)
Combine -765b and 153b to get -612b.
-612b=4\left(27+7\right)
Multiply 1 and 27 to get 27.
-612b=4\times 34
Add 27 and 7 to get 34.
-612b=136
Multiply 4 and 34 to get 136.
b=\frac{136}{-612}
Divide both sides by -612.
b=-\frac{2}{9}
Reduce the fraction \frac{136}{-612} to lowest terms by extracting and canceling out 68.
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