Question

-0,6(16 b -5)-(2,9 b- 8)-4(4-15b) якщо b:-9/13​

Answer 1

$- 0.6(16b - 5) - (2.9b - 8) - 4(4 - 15b) = - 9.6b + 3 - 2.9b + 8 - 16 + 60b = 47.5b - 5 = - \frac{95 \times 9}{2 \times 13} - 5 = - \frac{855}{26} - 5 = - 32 \frac{23}{26} - 5 = - 37\frac{23}{26}$