Question

решите уравнение
$\frac{5x - 1}{3} = \frac{9}{4}$
а)1,75 б)1,65 в)1,55 г)2,5​

Answer 1

$\frac{5x - 1}{3} = \frac{9}{4} \\ 4(5x - 1) = 27 \\ 20x - 4 = 27 \\ 20x = 27 + 4 \\ 20x = 31 \\ x = 31 \div 20 \\ x = 1 \frac{11}{20} \\ x = 1.55$