Question

4а -15б - 2. при а =5/6. б=2/45

Answer 1

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