Question

4а -15б - 2. при а =5/6. б=2/45

Answer 1

$4 \times \frac{5}{6 } - 15 \times \frac{2}{45} - 2 = \frac{20}{6} - \frac{2}{3} - \frac{2}{1} = \frac{20 - 4 - 12}{6} = \frac{4}{6} = \frac{2}{3}$