Question

(1207 Сократите дробь: 3а-15 3 1) 2) 16а - 20 8a - b b; 3) 4) 10-6a за - 5 12a-4 1-3а 5) 6) с-5 4c - 20 4a-b 2b-8a​

Answer 1

1)

$\frac{3a - 15}{3} = \frac{3(a - 5)}{3} = a - 5$

2)

$\frac{16a - 2b}{8a - b} = \frac{ 2(8a - b)}{ 8a - b} = 2$

3)

$\frac{10 - 6a}{3a - 5} = \frac{ - 2(3a - 5)}{3a - 5} = - 2$

4)

$\frac{12a - 4}{1 - 3a} = \frac{ - 4(1 - 3a)}{1 - 3a} = - 4$

5)

$\frac{c - 5}{4c - 20} = \frac{c - 5}{4(c - 5)} = \frac{1}{4} = 0.25$

6)

$\frac{4a - b}{2b - 8a} = \frac{4a - b}{ - 2(4a - b)} = - \frac{1}{2} = - 0.5$